Mail caught by greylisting?

[coolemail]

Can someone help? I have an email not getting through, and we have always received emails from this user before.

I have Plesk 9.2.3 on CentOS5.4 with ASL.

The maillog shows:

Nov 24 13:34:31 plesk2 /var/qmail/bin/relaylock[17300]: /var/qmail/bin/relaylock: mail from 194.196.100.164:35920 (mtagate4.uk.ibm.com)
Nov 24 13:34:31 plesk2 qmail-queue-handlers[17302]: Handlers Filter before-queue for qmail started ...
Nov 24 13:34:31 plesk2 qmail-queue-handlers[17302]: from=person@domain1.com
Nov 24 13:34:31 plesk2 qmail-queue-handlers[17302]: to=me@domain2.com
Nov 24 13:34:31 plesk2 qmail-queue-handlers[17302]: hook_dir = '/usr/local/psa/handlers/before-queue'
Nov 24 13:34:31 plesk2 qmail-queue-handlers[17302]: call_handlers: call executable = '/usr/local/psa/handlers/info/05-grey-SFxXqw/executable'
Nov 24 13:34:31 plesk2 greylisting filter[17303]: Starting greylisting filter...
Nov 24 13:34:31 plesk2 qmail-queue-handlers[17302]: handlers_stderr: DEFER
Nov 24 13:34:31 plesk2 qmail-queue-handlers[17302]: call_handlers: DEFER during call '/usr/local/psa/handlers/info/05-grey-SFxXqw/executable' handler
Nov 24 13:34:31 plesk2 qmail-queue-handlers[17302]: call_handlers: stop call handlers from dir '/usr/local/psa/handlers/before-queue/global'
Nov 24 13:34:36 plesk2 qmail: 1259069676.686048 delivery 14873: deferral: Sorry,_I_wasn't_able_to_establish_an_SMTP_connection._(#4.4.1)/
Nov 24 13:34:36 plesk2 qmail: 1259069676.686092 status: local 0/10 remote 1/20

It is over one hour since the greylisting appears to have stopped it, so it should have arrived by now. Can someone tell me where I can find out what has happened to it? And the initial email was from IBM. I think their mail servers would be properly set up!

many thanks in advance.

[coolemail]

Just over 3 hrs later the email was delivered. We only knew it was mising because a reply was sent to the original email which we received. That triggered us to check the mail log. I guess that their server took that long to re-send, but just surprised because we have received theirs in the past much quicker.