Dear Postfix users,
The Max Planck Society consists of several institutes/organizations each
running their own email infrastructure (which is good, as it’s
decentralized. Most of them have the a subdomain under mpg.de, and
sometimes we notice users from our institute sending emails to
colleagues with a typo, for example, xy.pg.de with a missing *m*. pg.de
is currently a parked domain, so our users will not going to email
there, and I would like to reject such messages submitted to us, that
the email client shows an error as it’s done, when, for example, users
submit a message to a colleague at our institute, and we now that
address does not exist, because the account was closed or it does not exist.
Could you recommend a way how to best set this up, best with a custom
error message per domain? For example:
Reject: Address has a typo: Should .pg.de .mpg.de?
`master.cf` currently contains:
141.14.17.8:submission inet n - n - -
smtpd
-o myhostname=mx.molgen.mpg.de
-o smtpd_recipient_restrictions=$mx_smtpd_recipient_restrictions
-o smtpd_client_recipient_rate_limit=50
Kind regards,
Paul
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