help me understand mysql-verify_recipients.cf

My value (the defaults value) are:

Code:

address_verify_transport_maps = static:smtp:[127.0.0.1]:10025
address_verify_virtual_transport = smtp:[127.0.0.1]:10025

 

Yeah, now I testing

Code:

address_verify_virtual_transport = smtp-int:[127.0.0.1]:10025
address_verify_transport_maps = static:smtp-int:[127.0.0.1]:10025

 

It turns out that I don't need to change main.cf at all. I reverted the settings back to the default values and left only the edited master.cf. So far, everything works for me.
It just required creating a new SMTP client and doing a bind on 127.0.0.1.

Code:

smtp      unix  -       -       y       -       -       smtp
        -o smtp_bind_address6=myipv6ip 4 mail server
        -o smtp_bind_address=myipv4ip 4 mail server
smtp-int      unix  -       -       y       -       -       smtp
        -o smtp_bind_address=127.0.0.1

 

The last configuration I'm testing, and it seems the most stable so far, is that I only modified main.cf, where I specified the bind IP addresses, and left master.cf in its default state, so no bind ip adress, no updated my network for port 10025, 10027.

main.cf

Code:

smtp_bind_address = myipv4ip 4 mail server
smtp_bind_address6 = myipv6ip 4 mail server

master.cf

Code:

smtp      unix  -       -       y       -       -       smtp

# Data returning from Amavis content filtering, defaults to incomming amavis port(10024) +1
127.0.0.1:10025 inet n - n - - smtpd
        -o content_filter=
        -o local_recipient_maps=
        -o relay_recipient_maps=
        -o smtpd_restriction_classes=
        -o smtpd_client_restrictions=
        -o smtpd_helo_restrictions=
        -o smtpd_sender_restrictions=
        -o smtpd_recipient_restrictions=permit_mynetworks,reject
        -o smtpd_end_of_data_restrictions=
        -o mynetworks=127.0.0.0/8
        -o strict_rfc821_envelopes=yes
        -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
        -o smtp_send_xforward_command=yes
        -o smtp_dns_support_level=disabled
        -o address_verify_virtual_transport=$virtual_transport
        -o address_verify_transport_maps=$transport_maps


# Data returning from Amavis DKIM signing, defaults to incomming amavis port(10026) +1
127.0.0.1:10027 inet n - n - - smtpd
        -o content_filter=
        -o local_recipient_maps=
        -o relay_recipient_maps=
        -o smtpd_restriction_classes=
        -o smtpd_client_restrictions=
        -o smtpd_helo_restrictions=
        -o smtpd_sender_restrictions=
        -o smtpd_recipient_restrictions=permit_mynetworks,reject
        -o smtpd_end_of_data_restrictions=
        -o mynetworks=127.0.0.0/8
        -o strict_rfc821_envelopes=yes
        -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
        -o smtp_send_xforward_command=yes
        -o smtp_dns_support_level=disabled
        -o address_verify_virtual_transport=$virtual_transport
        -o address_verify_transport_maps=$transport_maps
        -o milter_default_action=accept
        -o milter_macro_daemon_name=ORIGINATING

When I look at the source of the mails I see that the outgoing IP address is the one I need.
And I don't see any known errors in the log.
And tcpdump only shows communication from localhost, 127.0.0.1.

 

I also restored the master.cf file as originally and used "smtp_bind_address" in main.cf and everything works correctly.
So if you need to bind outgoing email to some specific IP this is the right way.