On 9/28/2010 4:44 PM, motty.cruz wrote:
Hello,
When a client has a typo in the recipient email address it takes 5 days for
my SMTP server to notify that the user does not exist or was unable to
deliver email. Any idea where to change the option to make it more reliable.
When a user addresses mail to a nonexistent domain, postfix
will reply immediately (unless you've foolishly set
soft_bounce=yes).
However, if the user happens to address mail to a domain that
exists but does not accept mail, postfix has no choice but to
continue retrying to deliver the message. I suspect this is
what you are referring to, but your problem report is incomplete.
An example of this is hotmal.com -- it has an A record but
doesn't answer on port 25. This behavior is identical to a
domain whose mail server is temporarily down, so it would be
wrong for postfix to return the mail immediately.
If you have lots of fat-fingered users, you can add
transport_maps entries to help with frequently mistyped domains.
# transport table
hotmal.com error:5.1.2 invalid recipient domain
hotmial.com error:5.1.2 invalid recipient domain
...
You can also consider setting delay_warning_time to a non-zero
value, 4h is probably reasonable, so the user will be notified
when their mail isn't delivered in a timely manner.
http://www.postfix.org/postconf.5.html#delay_warning_time
-- Noel Jones
