README.smtp

DBMail POP/IMAP before SMTP
===========================

DBMail can optionally keep a database table of the last time and IP
address of each successful POP or IMAP login. This way you can allow
your users to use your SMTP as a relay for a brief time after they log
into their email.

The dbmail_pbsp table is now created by default; you simply need to
enable one or both of the following entries in your dbmail.conf file,
depending on which services you would like to use for SMTP relay access:

[POP]
POP_BEFORE_SMTP=yes     # If yes, allows SMTP access from the host IP connecting by POP3.

[IMAP]
POP_BEFORE_SMTP=yes     # If yes, allows SMTP access from the host IP connecting by IMAP.

After that you'll have to configure your MTA to read out that table 
for allowing connections on those IP's. Please see the various
INSTALL.<yourfavoriteMTA> files for MTA configuration details.