Configuring SMTP Services

Contents

Overview

The Enterprise Gateway provides support for Simple Mail Transfer Protocol (SMTP), which enables the Enterprise Gateway to receive email and to act as a mail relay. The Enterprise Gateway can accept incoming email messages using the SMTP protocol, and then forward them on to a configured mail server. You can also use the Policy Studio to configure optional policy circuits for specific SMTP commands (for example, HELO/EHLO, AUTH, MAIL FROM, and so on).

When an SMTP command is configured in the Policy Studio, each time the SMTP command is accepted by the Enterprise Gateway, the appropriate policy circuit is executed. When the circuit completes successfully, the SMTP conversation resumes. This topic shows how to configure SMTP services, interfaces, and handler circuits using the Policy Studio.

Adding an SMTP Service

To add an SMTP service to enable the Enterprise Gateway to accept SMTP connections, perform the following steps in the Policy Studio:

  1. Under the Listeners node in the tree, select a Process node (for example, the default Oracle Enterprise Gateway).
  2. Right-click, and select Add SMTP Services.
  3. In the SMTP Services dialog, specify a unique name for the SMTP service in the Name field.
  4. In the Outgoing Server Settings section, complete the following settings:
    Host Host name or IP address of the remote mail server. This is the server to which the Enterprise Gateway forwards incoming SMTP commands (for example, stmp.gmail.com). You can also specify a mail server running locally on the same machine as the Enterprise Gateway using an address of localhost or 127.0.0.1.
    Port Port on which to connect to the remote mail server. Defaults to port 25.
  5. In the Security section, complete the following settings:
    Connection Security Select the type of security used for the connection to the remote mail server. Defaults to None. Other possible values are SSL and STARTTLS.
    Trusted Certificates Use this tab to select the trusted CA certificates used in the security handshake for the connection to the remote mail server. This field is mandatory if SSL or STARTTLS connection security is selected.
    Client SSL Authentication Use this tab to specify the trusted client certificates used in the security handshake for the connection to the remote mail server. This field is optional if SSL or STARTTLS connection security is selected.
    Advanced Use this tab to specify a list of ciphers to use during the security handshake for the connection to the remote mail server. Defaults to DEFAULT. For more details, see the OpenSSL ciphers manpage. This field is optional if SSL or STARTTLS connection security is selected.
  6. In the Authentication section, complete the following settings:
    Username Specify the username used to authenticate the Enterprise Gateway with a remote SMTP server using the AUTH SMTP command. For more details, see the section on SMTP Authentication.
    Password Specify the password used to authenticate the Enterprise Gateway with a remote SMTP server using the AUTH SMTP command. For more details, see the section on SMTP Authentication.
  7. Select the Include in real time monitoring checkbox to monitor the SMTP services using the Enterprise Gateway real-time monitoring and Service Monitor tools.
  8. Click OK. This creates a tree node for the STMP service under the selected process in the Services tree.

Adding an SMTP Interface

When you have configured the outbound SMTP protocol, you must then set up an inbound interface to accept client connections. You can choose from the following interface types:
TCP Non-secure connection. All traffic is sent in-the-clear.
SSL SSL handshake is performed at connection time, so the entire SMTP conversation is secure.
STARTTLS Initial connection is in the clear. The Enterprise Gateway advertises STARTTLS during the initial SMTP HELO/EHLO handshake. If the client supports this, it can send a STARTTLS command to the Enterprise Gateway, which in turn promotes connection security, and upgrades the connection to SSL/TLS.

Because the SSL and STARTTLS interface types have the potential to be secure (STARTTLS starts off non-secure, but can be upgraded during the SMTP conversation), a common configuration screen is used for both protocols in the Policy Studio.

To configure an inbound interface, perform the following steps in the Policy Studio:

  1. Under the Listeners node in the tree, select the SMTP node under the Process.
  2. Right-click, and select Add Interface -> interface type (TCP, SSL, or STARTTLS).
  3. Complete the settings on the relevant dialog. For full details on these settings, see the Configuring HTTP Services topic.
  4. Click OK.

Configuring Circuit Handlers for SMTP Commands

You can use the Policy Studio to configure optional policy circuit handlers for each of the following SMTP commands:

  • HELO/EHLO
  • AUTH
  • MAIL FROM
  • RCPT TO
  • DATA

The next sections explain how to configure circuit handlers for each command.

Adding an HELO/EHLO Circuit Handler

The HELO/EHLO policy circuit handler is invoked when a HELO/EHLO SMTP command is received from a client. This handler enables you to modify the HELO/EHLO greeting and the client domain. You can configure the greeting message sent back to the client from the Enterprise Gateway during the HELO/EHLO handshake as required. You can also configure a circuit to replace the value of smtp.helo.greeting. The domain specified by the connected client in the HELO/EHLO command can be modified before forwarding on to the remote mail server. You can also configure a circuit to replace the value of smtp.helo.domain.

To configure a policy circuit handler for the HELO/EHLO command, perform the following steps:

  1. Under the Listeners node in the tree, select the SMTP node under the Process.
  2. Right-click, and select Add Circuit Handler -> HELO/EHLO.
  3. In the Configure HELO Host dialog, specify the Greeting to be sent back to the client as part of the HELO/EHLO handshake. Defaults to Hello ${smtp.helo.domain}.
  4. In the Policy tree, select the policy that you wish to handle the HELO/EHLO command.
  5. Click OK.

Message attributes
The following message attributes are generated during processing:
Message Attribute Description
smtp.helo.domain The domain specified by the connecting client in its HELO/EHLO SMTP command.
smtp.helo.greeting The HELO greeting to be sent back to the client after HELO/EHLO processing is performed. The default value is: Hello ${smtp.helo.domain}.
monitoring.enabled true if monitoring is enabled for the protocol, otherwise false.
message.monitoring.enabled true if message-monitoring is enabled for the protocol, otherwise false.

Adding an AUTH Circuit Handler

The AUTH policy circuit handler is invoked when an AUTH SMTP command is received from a client. You can use the AUTH handler to run a circuit to perform user authentication checks. For example, during the Authentication phase of the SMTP conversation, the client-supplied username and password can be verified against an Authentication Repository using a circuit containing an Attribute Authentication filter. For details on possible authentication scenarios, see the section on SMTP Authentication.

To configure a circuit handler for the AUTH command, perform the following steps:

  1. Under the Listeners node in the tree, select the SMTP node under the Process.
  2. Right-click, and select Add Circuit Handler -> AUTH.
  3. In the Configure AUTH dialog, in the Policy tree, select the policy that you wish to handle the AUTH command.
  4. Click OK.

Message attributes
The following message attributes are generated during processing:
Message Attribute Description
authentication.subject.id The username supplied by the client.
authentication.subject.password The password supplied by the client.
monitoring.enabled true if monitoring is enabled for the protocol, otherwise false.
message.monitoring.enabled true if message-monitoring is enabled for the protocol, otherwise false.

Adding a MAIL Circuit Handler

The MAIL policy circuit handler is invoked when a MAIL FROM SMTP command is received from a client. Emails can be rejected based on wildcard matching of the supplied sender address in the MAIL FROM SMTP command. For example, email addresses containing GMAIL.COM (fromAddress of *@gmail.com) as the domain could be accepted using a simple True filter. Whereas, email addresses containing YAHOO.COM (fromAddress of *@yahoo.com) could be rejected using a simple False filter.

To configure a policy circuit handler for the MAIL FROM command, perform the following steps:

  1. Under the Listeners node in the tree, select the SMTP node under the Process.
  2. Right-click, and select Add Circuit Handler -> MAIL.
  3. In the Configure MAIL Address dialog, you must specify the From Address. This is an email address used to filter addresses specified in the MAIL FROM SMTP command. You can specify this as a wildcard. The following are some example values:
    From Address Description
    * Runs the circuit for any email address received.
    *@gmail.com Runs the circuit for all email addresses with the domain gmail.com.
    S*@oracle.* Runs the circuit for all email addresses with any oracle domain, and beginning with the letter s.
    The circuit selection is performed on a best-match basis.
  4. In the Policy tree, select the policy that you wish to handle the MAIL FROM command.
  5. Click OK.

You can configure multiple MAIL handlers so that different filter circuits are executed, depending on the received mail address.

Message attributes
The following message attributes are generated during processing:
Message Attribute Description
smtp.mail.from The email address specified in the MAIL FROM SMTP command received from the client.
monitoring.enabled true if monitoring is enabled for the protocol, otherwise false.
message.monitoring.enabled true if message-monitoring is enabled for the protocol, otherwise false.

Adding a RCPT Circuit Handler

The RCPT policy circuit handler is invoked when a RCPT TO SMTP command is received from a client. You can use this handler to filter addresses specified in the RCPT TO SMTP command. Recipients can be rejected based on wildcard matching of the supplied recipient address in the RCPT SMTP command. For example, recipient addresses containing GMAIL.COM (toAddress of *@gmail.com) as the domain could be accepted using a simple True filter. Whereas, addresses containing YAHOO.COM (toAddress of *@yahoo.com) could be rejected using a simple False filter. You can configure multiple RCPT handlers so that different filter circuits are executed, depending on the received email address.

To configure a circuit handler for the RCPT TO command, perform the following steps:

  1. Under the Listeners node in the tree, select the SMTP node under the Process.
  2. Right-click, and select Add Circuit Handler -> RCPT.
  3. In the Configure Recipient Address dialog, you must specify the To Address. This is an email address used to filter addresses specified in the RCPT TO SMTP command. You can specify this as a wildcard. The following are some example values:
    To Address Description
    * Runs the circuit for any email address received.
    *@oracle.com Runs the circuit for all email addresses with the domain oracle.com.
    d*@yahoo.* Runs the circuit for all email addresses with any yahoo domain, and beginning with the letter d.
    The circuit selection is performed on a best-match basis.
  4. In the Policy tree, select the policy that you wish to handle the MAIL FROM command.
  5. Click OK.

Message attributes
The following message attributes are generated during processing:
Message Attribute Description
smtp.rcpt.to The email address specified in the RCPT TO SMTP command received from the client.
monitoring.enabled true if monitoring is enabled for the protocol, otherwise false.
message.monitoring.enabled true if message-monitoring is enabled for the protocol, otherwise false.

Adding a DATA Circuit Handler

The DATA policy circuit handler is invoked when a DATA SMTP command is received from a client. For example, for emails that contain SOAP/XML content, you can add an XML signature to the XML data, stored in the content.body message attribute, using an XML Signature Generation filter. For emails containing attachments, the attached mail data can be run through one of the Enterprise Gateway anti-virus filters. Alternatively, you can use SMIME Encrypt or SMIME Decrypt filters to encrypt or decrypt emails (including attachments) passing through the Enterprise Gateway. You can also digitally sign emails using an SMIME Sign filter, or verify signatures on already digitally signed emails using an SMIME Verify filter.

To configure a policy circuit handler for the DATA command, perform the following steps:

  1. Under the Listeners node in the tree, select the SMTP node under the Process.
  2. Right-click, and select Add Circuit Handler -> DATA.
  3. In the Policy tree, select the policy that you wish to handle the DATA command.
  4. Click OK.

Message attributes
The following message attributes are added during processing:
Message Attribute Description
content.body The stream representing the body of the mail. Note that the content.body does not include MIME headers.
monitoring.enabled true if monitoring is enabled for the protocol, otherwise false.
message.monitoring.enabled true if message monitoring is enabled for the protocol, otherwise false.

SMTP Authentication

The SMTP protocol supports Extended SMTP (ESMTP) PLAIN authentication. The following matrix shows the possible authentication scenarios and actions based on the SMTP Services configuration:
Scenario AUTH Handler AUTH Username and Password Mail Server advertises AUTH Enterprise Gateway advertises AUTH Proxy client AUTH Authenticate Enterprise Gateway to Server
1 No No No No No No
2 No No Yes Yes Yes No
3 No Yes No No No No
4 No Yes Yes No No Yes
5 Yes No No Yes No No
6 Yes No Yes Yes No No
7 Yes Yes No Yes No No
8 Yes Yes Yes Yes No Yes

These authentication scenarios are described as follows:

  1. No authentication username and password are specified so the Enterprise Gateway does not attempt to authenticate with the server. The server does not support authentication anyway. The mail server does not advertise authentication so the Enterprise Gateway does not advertise AUTH to the client. The client authentication is not proxied because the server does not support it.
  2. No authentication username and password are specified so the Enterprise Gateway does not attempt to authenticate with the server. The server does not support authentication anyway. The mail server advertises AUTH, so the Enterprise Gateway advertises AUTH to the client. No AUTH handler is configured, so the client authentication details are proxied to the server.
  3. Same as 1 above.
  4. The authentication username and password are specified so the Enterprise Gateway authenticates with the server. The mail server advertises AUTH, but because a username and password are specified, the Enterprise Gateway does not advertise AUTH to the client because the Enterprise Gateway authenticates with the server using the configured credentials. This also implies no client authentication proxying.
  5. No authentication username and password are specified so the Enterprise Gateway does not attempt to authenticate with the server. The server does not support authentication anyway. AUTH handler configured, which implies the Enterprise Gateway performs authentication, so advertise AUTH to the client.
  6. Same as 5 above.
  7. AUTH handler configured, which implies the Enterprise Gateway performs authentication, so advertise AUTH to the client. No proxying occurs because the Enterprise Gateway performs the authentication. No authentication is performed with the server because the server does not support it.
  8. AUTH advertised to the client because the Enterprise Gateway performs authentication (and the mail server supports it). AUTH handler configured, which implies the Enterprise Gateway performs authentication. No proxying occurs because the Enterprise Gateway performs the authentication. Authentication is performed with the server because the server supports AUTH and a username and password is configured.

SMTP Content-Transfer-Encoding

The SMTP protocol supports automatic Content-Transfer-Encoding/Decoding. For DATA SMTP commands, the content of the incoming mail body may be encoded. To enable circuit filters to view and/or manipulate the raw body data, the contents are automatically decoded before circuit execution, and re-encoded afterwards (before being forwarded on to the configured outbound mail server).

Supported encodings
The following encodings are supported:

  • Base64
  • 7-bit
  • 8-bit
  • quoted-printable
  • binary

However, Base64 is the only encoding that results in decoding/re-encoding of the mail data.

Multi-part MIME content, generally used for sending attachments in SMTP, is also supported. Each separate body in the multi-part is checked for a Content-Transfer-Encoding, and the decoding/re-encoding is performed as appropriate.

Deployment Example

This section provides a step-by-step example of how to configure and deploy SMTP services using the Enterprise Gateway. In this example, the Enterprise Gateway acts as a relay between a Thunderbird email client and the Google Gmail service.

Configuring the Enterprise Gateway SMTP Services
The Enterprise Gateway connects to the Gmail STARTTLS interface, which is available at smtp.gmail.com, and listening on port 587. To configure the SMTP Services, perform the following steps in the Policy Studio:

  1. Under the Listeners node in the tree, select a Process node (for example, the default Oracle Enterprise Gateway).
  2. Right-click, and select Add SMTP Services.
  3. Enter smtp.gmail.com for the Host.
  4. Enter 587 for the Port.
  5. Select STARTTLS from the Connection Security drop-down list. This is selected because smtp.gmail.com:587 exposes the Gmail STARTTLS SMTP interface.
  6. Because STARTTLS has the potential to be upgraded to a secure connection, you must also select some Trusted Certificates.
  7. Accept all other defaults, and click OK to add the SMTP services.

Configuring the SMTP Client Interface
To configure a STARTTLS client interface, perform the following steps in the Policy Studio:

  1. Right-click the SMTP Services node, and select Add Interface -> STARTTLS.
  2. Enter a Port (for example, 8026). This is the port on which the Enterprise Gateway’s incoming SMTP traffic is accepted. You can enter any port that is not already in use.
  3. Because STARTTLS has the potential to be upgraded to a secure connection, you must configure a trusted certificate. Click the X.509 Certificate button.
  4. Select a certificate in the Select Certificate dialog.
  5. Click OK to return to the Configure STARTTLS Interface dialog.
  6. When the certificate has been configured, accept all other defaults, and click OK to add the incoming STARTTLS interface.

When the STMP services and STARTTLS client interface have been configured, you must deploy the changes to the Enterprise Gateway.

Configuring Thunderbird Client Settings
This example uses Thunderbird as the email client. However, you can use any standard email client that supports SMTP. Thunderbird is available as a free download from http://www.mozillamessaging.com/.

To configure a STARTTLS outgoing server in your Thunderbird client, perform the following steps:

  1. Launch the Thunderbird email client.
  2. From the main menu, select Tools -> Account Settings.
  3. Expand the Local Folders tree node in the left pane.
  4. Select the Outgoing Server node to create a new outgoing server configuration.
  5. Click Add to display the STMP Server dialog.
  6. Enter Oracle Enterprise Gateway [STARTTLS] in the Description field.
  7. Enter localhost (or the IP Address of the machine on which the Enterprise Gateway service is running) in the Server Name field.
  8. Enter 8026 in the Port field. This will send SMTP traffic to the STARTTLS interface configured above, so the ports must match.
  9. Select STARTTLS from the Connection security drop-down list. Traffic on this connection may be upgraded to secure during the SMTP conversation.
  10. Select Normal Password from the Authentication method drop-down list. This indicates that Authentication will be performed.
  11. Enter a valid Gmail user-name for the User Name.
  12. Click OK to add the new outgoing server configuration.

Configuring Certificates in Thunderbird
To enable Thunderbird to successfully negotiate the STARTTLS conversation with the Enterprise Gateway, you must import a CA certificate into Thunderbird. This is also because a certificate was already generated and imported into the Enterprise Gateway when configuring its STARTTLS client interface.

To configure a STARTTLS outgoing server in your Thunderbird client, perform the following steps:

  1. From the Thunderbird main menu, select Tools -> Options.
  2. Select the Certificates tab.
  3. Click the View Certificates button, to display the Certificate Manager dialog.
  4. Click Import, and import the appropriate CA certificate.
  5. Click OK when finished.

Testing the STARTTLS Client Interface
To test the STARTTLS client interface using Thunderbird, perform the following steps:

  1. Launch the Thunderbird email client, and create a new mail message.
  2. Enter a valid Gmail address in the To field.
  3. Enter Enterprise Gateway Test as the Subject.
  4. Enter This mail has been sent using Oracle Enterprise Gateway in the mail body.
  5. To specify the appropriate outgoing mail server, select Tools -> Account Settings from the main menu.
  6. Select Oracle Enterprise Gateway [STARTTLS] - localhost from the Outgoing Server drop-down list.
  7. Click OK.
  8. Send the mail.

The following example from the Enterprise Gateway trace shows the SMTP commands that occur. Commands marked in bold text shows traffic from the Thunderbird client to the Enterprise Gateway and vice versa. Commands marked in bold italics shows traffic from the Enterprise Gateway to the Gmail server at smtp.gmail.com:587, and vice versa. 

    
DEBUG  14:46:46:546 [14b4] incoming call on interface *:8026 from 127.0.0.1:1487
DEBUG  14:46:46:546 [14b4] new connection 08133248,  settings source incoming interface 
(force 1.0=no, idleTimeout=60000, activeTimeout=60000)
DATA   14:46:46:546 [14b4] snd 0018: <220 doejOracle>
DATA   14:46:46:562 [14b4] rcv 18: <EHLO [127.0.0.1]>
DEBUG  14:46:46:562 [14b4] 080BE260: new connection cache set SMTP Client
DEBUG  14:46:46:562 [159c] idle connection monitor thread running
DEBUG  14:46:46:562 [14b4] new endpoint smtp.gmail.com:587
DEBUG  14:46:46:640 [14b4] Resolved smtp.gmail.com:587 to:
DEBUG  14:46:46:640 [14b4]     209.85.227.109:587
DEBUG  14:46:46:718 [14b4] connected to 209.85.227.109:587
DEBUG  14:46:46:718 [14b4] new connection 08135BA0,  settings source service-wide defaults 
(force 1.0=no, idleTimeout=15000, activeTimeout=30000)
DATA   14:46:46:765 [14b4] rcv 44: <220 mx.google.com ESMTP v11sm7979387weq.40>
DATA   14:46:46:765 [14b4] snd 0018: <ehlo [127.0.0.1]>
DATA   14:46:46:812 [14b4] rcv 125: <250-mx.google.com at your service, [87.198.245.194]
250-SIZE 35651584
250-8BITMIME
250-STARTTLS
250 ENHANCEDSTATUSCODES>
DATA   14:46:46:812 [14b4] snd 0010: <starttls>
DATA   14:46:46:843 [14b4] rcv 30: <220 2.0.0 Ready to start TLS>
DEBUG  14:46:46:843 [14b4] push SSL protocol on to connection
DEBUG  14:46:46:906 [14b4] No SSL host name provided: using default certificate for interface
DEBUG  14:46:46:906 [14b4] verifyCert: preverify=1, depth=2, subject /C=US/O=Equifax/OU=Equifax 
Secure Certificate Authority, issuer /C=US/O=Equifax/OU=Equifax Secure Certificate Authority
DEBUG  14:46:46:906 [14b4] ca cert? 1
DEBUG  14:46:46:906 [14b4] verifyCert: preverify=1, depth=1, subject /O=Google Inc/CN=Google 
Internet Authority, issuer /C=US/O=Equifax/OU=Equifax Secure Certificate Authority
DEBUG  14:46:46:906 [14b4] verifyCert: preverify=1, depth=0, subject 
/C=US/ST=California/L=Mountain View/O=Google Inc/CN=smtp.gmail.com, 
issuer /C=US/O=Google Inc/CN=Google Internet Authority
DEBUG  14:46:46:952 [14b4] negotiated SSL cipher "RC4-MD5", session 00000000 (not reused)
DATA   14:46:46:952 [14b4] snd 0018: <ehlo [127.0.0.1]>
DATA   14:46:46:999 [14b4] rcv 140: <250-mx.google.com at your service, [87.198.245.194]
250-SIZE 35651584
250-8BITMIME
250-AUTH LOGIN PLAIN XOAUTH
250 ENHANCEDSTATUSCODES>
DATA   14:46:46:999 [14b4] snd 0109: <250-OracleEnterprise Gateway Hello [127.0.0.1]
250-SIZE 35651584
250-8BITMIME
250-STARTTLS
250 ENHANCEDSTATUSCODES>
DEBUG  14:46:46:999 [14b4] delete transaction 0B95D2C0 on connection 08133248
DATA   14:46:46:999 [14b4] rcv 10: <STARTTLS>
DATA   14:46:46:999 [14b4] snd 0014: <220 Go ahead>
DEBUG  14:46:46:999 [14b4] push SSL protocol on to connection
DEBUG  14:46:46:999 [14b4] Servername CB: SSL host name: localhost, not in host map - 
using default certificate for interface
DEBUG  14:46:47:031 [14b4] negotiated SSL cipher "AES256-SHA", session 00000000 (not reused)
DATA   14:46:47:031 [14b4] rcv 18: <EHLO [127.0.0.1]>
DATA   14:46:47:031 [14b4] snd 0018: <ehlo [127.0.0.1]>
DATA   14:46:47:077 [14b4] rcv 140: <250-mx.google.com at your service, [87.198.245.194]
250-SIZE 35651584
250-8BITMIME
250-AUTH LOGIN PLAIN XOAUTH
250 ENHANCEDSTATUSCODES>
DATA   14:46:47:077 [14b4] snd 0124: <250-OracleEnterprise Gateway Hello [127.0.0.1]
250-SIZE 35651584
250-8BITMIME
250-AUTH LOGIN PLAIN XOAUTH
250 ENHANCEDSTATUSCODES>
DEBUG  14:46:47:077 [14b4] delete transaction 0B95D2C0 on connection 08133248
DATA   14:46:47:077 [14b4] rcv 41: <AUTH PLAIN ADGzaHllaDe0SHF1ex2r82Su555=>
DATA   14:46:47:077 [14b4] snd 0041: <auth PLAIN ADGzaHllaDe0SHF1ex2r82Su555=>
DATA   14:46:47:718 [14b4] rcv 20: <235 2.7.0 Accepted>
DATA   14:46:47:718 [14b4] snd 0020: <235 2.7.0 Accepted>
DATA   14:46:47:718 [14b4] rcv 45: <MAIL FROM:<john.doe@oracle.com> SIZE=444>
DATA   14:46:47:718 [14b4] snd 0036: <mail from:<john.doe@oracle.com>>
DATA   14:46:47:765 [14b4] rcv 33: <250 2.1.0 OK v11sm7979387weq.40>
DATA   14:46:47:765 [14b4] snd 0033: <250 2.1.0 OK v11sm7979387weq.40>
DATA   14:46:47:765 [14b4] rcv 30: <RCPT TO:<test@gmail.com>>
DATA   14:46:47:765 [14b4] snd 0030: <rcpt to:<test@gmail.com>>
DATA   14:46:47:812 [14b4] rcv 33: <250 2.1.5 OK v11sm7979387weq.40>
DATA   14:46:47:812 [14b4] snd 0033: <250 2.1.5 OK v11sm7979387weq.40>
DATA   14:46:47:812 [14b4] rcv 6: <DATA>
DATA   14:46:47:812 [14b4] snd 0006: <data>
DATA   14:46:48:609 [14b4] rcv 34: <354  Go ahead v11sm7979387weq.40>
DATA   14:46:48:609 [14b4] snd 0008: <354 OK>
DATA   14:46:48:609 [14b4] rcv 447: <Message-ID: <4CB85B46.4060205@oracle.com>
Date: Fri, 15 Oct 2010 14:46:46 +0100
From: John Doe <john.doe@oracle.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.9) Gecko/20100915 
Thunderbird/3.1.4
MIME-Version: 1.0
To: test@gmail.com
Subject: Enterprise Gateway Test
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

 This mail has been sent via Oracle Enterprise Gateway

.>
DATA    14:46:48:609 [14b4] snd 0442: <Message-ID: <4CB85B46.4060205@oracle.com>
Date: Fri, 15 Oct 2010 14:46:46 +0100
From: John Doe <john.doe@oracle.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.9) Gecko/20100915 
Thunderbird/3.1.4
MIME-Version: 1.0
To: test@gmail.com
Subject: Enterprise Gateway Test
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

 This mail has been sent via Oracle Enterprise Gateway>
DATA    14:46:48:609 [14b4] snd 0005: <.>
DATA    14:46:49:874 [14b4] rcv 44: <250 2.0.0 OK 1287150409 v11sm7979387weq.40>
DATA    14:46:49:874 [14b4] snd 0044: <250 2.0.0 OK 1287150409 v11sm7979387weq.40>
DEBUG   14:46:49:874 [14b4] delete transaction 0B95D2C0 on connection 08133248
DATA    14:46:49:874 [14b4] rcv 6: <QUIT>
DATA    14:46:49:874 [14b4] snd 0006: <quit>
DATA    14:46:49:921 [14b4] rcv 49: <221 2.0.0 closing connection v11sm7979387weq.40>
DEBUG   14:46:49:921 [14b4] delete transaction 08040BD8 on connection 08135BA0
DATA    14:46:49:921 [14b4] snd 0049: <221 2.0.0 closing connection v11sm7979387weq.40>
DEBUG   14:46:49:921 [14b4] delete transaction 0B95D2C0 on connection 08133248
DEBUG   14:46:49:921 [14b4] delete connection 08133248, current transaction 00000000