Josef Karliak:
> Good day everybody,
> could I change SMTP error message ? For example email doesn't
> exists, email return message like "5.1.1 smtp; 550 5.1.1
> <noem...@fn.ca>: Recipient address rejected: User unknown in local
> recipient table> #SMTP#. Could I change this message, for my own
> message in the czech language ? (without diacritics of course:)
Wietse:
> No. However, you can APPEND a local text to the reply if you
> upgrade to Postfix 2.8.
Reindl Harald:
> this is a nice feature and active here since 2011-01
>
> but be careful if you use postfix behind a barracuda-spamfirewall
> the firewall has to be exlcuded from "smtpd_reject_footer" because
> it will answer only the last line (reject footer) to a sending
> server if the rcpt does not exist and the sender does not get "User
> unknown"
For automated processing, "550 5.1.1" at the beginning of the last
line should be sufficient to determine that the address is invalid.
For human processing, it matters little what the text says...
Wietse
