On 3/15/2011 12:30 PM, Neil wrote:
Hi,
A while back I accidentally configured my mail client to send
my email as user@example (instead of u...@example.com
<mailto:u...@example.com>), leading to me sending out about
two dozen messages before I started getting mail back from
people saying they couldn't reply and had to retype my address.
I was wondering if there was any way to guard against this in
postfix? (In addition to me being more careful when
configuring my accounts, of course.)
My setup is a little unusual in that, besides sending from the
domain I have postfix configured to serve, I also use postfix
to act as a middle-man for me, logging into other SMTP servers
and passing along messages I send from other email addresses
to their respective servers.
So I assume any solution to this is going to have to extract
the email addresses from sender_relays in order to still
permit those other email addresses to work.
Sorry for the verboseness, and thank you for any ideas you
might have.
postconf -n:
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated, reject_unauth_destination,
reject_invalid_helo_hostname, reject_non_fqdn_helo_hostname,
reject_non_fqdn_sender, reject_unlisted_sender,
reject_unlisted_recipient,
(When posting from gmail, please click the [Plain Text] button.)
Change the above to
smtpd_recipient_restrictions =
reject_non_fqdn_sender
reject_unknown_sender_domain
reject_unlisted_sender
permit_mynetworks
permit_sasl_authenticated
reject_unauth_destination
reject_unlisted_recipient
reject_non_fqdn_helo_name
NB: This provides some protection against bad envelope sender
addresses. This does NOT protect against bad From: or
Reply-To: headers. This does NOT protect mail submitted via
the sendmail(1) command.
-- Noel Jones
