[CentOS] sendmail Deferred mail - reason unknown
Scott Silva
ssilva at sgvwater.com
Mon Dec 15 21:57:17 UTC 2008
on 12-15-2008 8:15 AM Sean Carolan spake the following:
> I'm a bit baffled by this problem. Maybe there's a sendmail guru out
> there who can help me out here. We have some end-users who need to
> receive system-generated mail that originates from a java-based
> application on our network. The java app sends the mail through our
> sendmail cluster, which then sends the email on to the end-user over the
> Internet. The size of the emails can range from a few kb up through
> around 2Mb in size.
>
> The mail logs show that these emails are typically delayed for up to 24
> hours, sometimes longer. It appears that several attempts to deliver
> the email are made, with each unsuccessful one showing "Deferred" status
> in the maillog. After several hours of failed attempts the mail finally
> goes through successfully. Here is a typical entry (customer name
> redacted):
>
> exmx1 : Dec 14 05:28:39 exmx1 sendmail[31574]: mBDIYhEa031574:
> to=<customer at example.com
> <mailto:customer at example.com>>,
> delay=00:00:00, xde
> lay=00:00:00, mailer=esmtp, pri=41874, relay=mail.example.com
> <http://mail.example.com>., dsn=4.0.0, stat=Deferred
>
> Unfortunately there is no reason given for the "Deferred" status such as
> "Server unavailable", etc.
>
> Do you have any ideas how I can begin to troubleshoot this?
>
Does the machine have good dns resolution?
Are the clocks synced to a proper time.. (IE... local time is +8 but the clock
is actually -8). GMT is OK as long as the box knows that is its timezone.
--
MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 250 bytes
Desc: OpenPGP digital signature
URL: <http://lists.centos.org/pipermail/centos/attachments/20081215/9f55f7e0/attachment.sig>
More information about the CentOS
mailing list