To Configure the Inbound MTA Relays with LMTP

To configure inbound MTA relays to use LMTP, do the following:

Steps

1. Modify your imta.cnf file and change the LMTP rewrite rules to read:

   ! lmtp .lmtp $E$F$U%$H.lmtp@lmtpcs-daemon .lmtp $B$F$U%$H@$H@lmtpcs-daemon ! ! lmtp native .lmtpn $E$F$U%$H.lmtpn@lmtpcn-daemon .lmtpn $B$F$U%$H@$H@lmtpcn-daemon !

2. Set the mailbox DELIVERY_OPTIONS to:

   #*mailbox=@$X.LMTP:$M%$\$2I$_+$2S@lmtpcs-daemon

3. Set the native DELIVERY_OPTIONS clause to:

   #*native=@$X.LMTPN:$M+$2S@native-daemon

4. Add the channel keywords multigate connectcanonical to each of the tcp_lmtp* channel blocks.

5. Add the following channel keywords to the tcp_lmtpcs channel:

   fileinto @$4O:$U+$S@$D

   Note that the 'O' in the keyword above is a capital letter O, not a zero.

6. The incoming MTA relay configuration settings should look like this:

   The option.dat entry for DELIVERY_OPTIONS should look like this:

   !------------------------------------------ ! Modified DELIVERY_OPTIONS to activate LMTP ! delivery from a frontend to the backend store !-------------------------------------------- ! DELIVERY_OPTIONS=\ #*mailbox=@$X.LMTP:$M%$\$2I$_+$2S@lmtpcs-daemon,\ #&members=*,\ #*native=@$X.LMTPN:$M+$2S@native-daemon,\ #*unix=@$X.LMTPN:$M,\ #*file=@$X.LMTPN:+$F,\ #&@members_offline=*,\ #/hold=@hold-daemon:$A,\ #program=$M%$P@pipe-daemon,\ #forward=**,\ #*^!autoreply=$M+$D@bitbucket !

   After your changes the modified imta.cnf rewrite rules should look like this:

   ! lmtp .lmtp $E$F$U%$H.lmtp@lmtpcs-daemon .lmtp $B$F$U%$H@$H@lmtpcs-daemon ! ! lmtp native .lmtpn $E$F$U%$H.lmtpn@lmtpcn-daemon .lmtpn $B$F$U%$H@$H@lmtpcn-daemon !

   The changed channel blocks should look like this:

   ! ! tcp_lmtpcs (LMTP client - store) tcp_lmtpcs defragment lmtp multigate connectcanonical \ fileinto @$4O:$U+$S@$D port 225 nodns single_sys \ subdirs 20 maxjobs 7 pool SMTP_POOL dequeue_removeroute lmtpcs-daemon ! ! tcp_lmtpcn (LMTP client - native) tcp_lmtpcn defragment lmtp multigate connectcanonical port 226 \ nodns single_sys subdirs 20 maxjobs 7 pool SMTP_POOL dequeue_removeroute lmtpcn-daemon