Wietse Venema: > i...@itrezero.it: > > Good morning. > > Maybe I wasn't able to write a clear request :-( I'll try another way. > > > > I've a set of IPs. I need to authenticate against each of them > > (useing different accounts on the same domain: us...@domain.com , > > us...@domain.com , ) and want that emails are to be sent through > > the same IP. For instance, if user1 makes authentication (I use > > Postfix + Dovecot for a pop3-before-smtp) using IP1, his emails > > must go out through IP1. The same with user2 on IP2, etc. How can > > I reach this target? > > To properly implement distinct MTA personalities, use one MTA per > IP address: http://www.postfix.org/MULTI_INSTANCE_README.html. > Unfortunately some (Linux) distributions tinker with Postfix and > unintentionally break multi-instance support. You may have to shop > around or build from source.
To be clear, the following requires 2.7 or later. > It is possible to implement a partial solution with master.cf overrides: > > # filter without nexthop, requires Postfix 2.7. > address1:smtp .. .. .. .. .. .. smtpd -o filter=smtp1: > address2:smtp .. .. .. .. .. .. smtpd -o filter=smtp2: > > smtp1 .. .. .. .. .. .. smtp -o smtp_bind_address=address1 > smtp2 .. .. .. .. .. .. smtp -o smtp_bind_address=address2 > > http://www.postfix.org/postconf.5.html#smtp_bind_address > http://www.postfix.org/master.5.html > ftp://ftp.porcupine.org/mirrors/postfix-release/official/postfix-2.7.16.RELEASE_NOTES > > Wietse >
