On 2011-02-22, Timo Sirainen wrote:
On Mon, 2011-02-21 at 11:05 +0100, Petter Urkedal wrote:
Is it possible to change the reject codes from the Dovecot LMTP agent? In particular I would like to change the "550 5.1.1 <...> User doesn't exist." to a temporary failure, since we already validate email addresses on the mail front-end, and such errors are most likely due to a temporary glitch in the user database lookup.
What userdb are you using? Temporary userdb lookup glitches should cause Dovecot to return a temporary error failure, not "user doesn't exist"..
We are using auth-system.conf.ext with
passdb {
driver = pam
}
userdb {
driver = passwd
args = home=/srv/mail/nbi.ku.dk/%1n/%n mail=maildir:~/Maildir
}We also have a post-login script which may override MAIL if the mail directory does not exist. This is on Red Hat 6 with the new sssd-based user database and authentication.
We only have two rejects of this type, 9 s apart, since we switched to the new mail server a week ago, so it's a rare event.
We use Postfix on the front-end, which is very configurable in this respect. I don't see a way to override the error code from LMTP, though, but suggestions are welcome.
I don't really like adding settings that have very few users..
I understand, it's really a workaround. A global directive to turn all permanent errors into temporary ones, would do as well, since any error from LMTP is a potential issue we want to know about. I'm not sure whether that's any nicer from your point of view.