System Administration Guide: Network Services

Change to the Built-In Mailer From Version 8.12 of sendmail

The old [TCP] built-in mailer is not available. Use the P=[IPC] built-in mailer instead. The interprocess communications ([IPC]) built-in mailer now enables delivery to a UNIX domain socket on systems that support it. You can use this mailer with LMTP delivery agents that listen on a named socket. An example mailer might resemble the following.


Mexecmail, P=[IPC], F=lsDFMmnqSXzA5@/:|, E=\r\n, 
S=10, R=20/40, T=DNS/RFC822/X-Unix, A=FILE /var/run/lmtpd

The first mailer argument in the [IPC] mailer is now checked for a legitimate value. The following table provides possible values for the first mailer argument.

Table 14–31 Possible Values for the First Mailer Argument

Value 

Description 

A=FILE

Use for UNIX domain socket delivery 

A=TCP

Use for TCP/IP connections 

A=IPC

Is no longer available as a first mailer argument