Emails lost or stuck in progress

keat63

Well-Known Member
Nov 20, 2014
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Root Administrator
Users complaining this morning that they've had no emails since 07:03.
I can't see anything in the mailbox, or queue.
But if i run a amil delivery report against one of the accounts, I see this.

Code:
Event: inprogress [IMG]https://xxxx.xxxxxxx.co.uk:2087/cPanel_magic_revision_0/cjt/images/icons/unknown.png[/IMG]
Sender User: myuser
Sender Domain: mydomian.co.uk
From Address: [email protected]
Sender: [email protected]
Sent Time: Mar 13, 2019, 9:01:09 AM
Sender Host: www.mydomian.co.uk
Sender IP: xxx.xxx.xxx.xxx
Authentication: dovecot_login
Recipient: unknown
Delivered To: unknown
Delivery User: unknown
Delivery Domain: unknown
Router: unknown
Transport: unknown
Out Time: Mar 13, 2019, 9:01:09 AM
ID: 1h3zlX-0003wB-PC
Delivery Host:
Delivery IP:
Size: 2.46 KB
Result: In progress
any throughts as to what's going on ?
 

keat63

Well-Known Member
Nov 20, 2014
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108
93
cPanel Access Level
Root Administrator
It looks like this was related to CSF MailScanner.
We ran a mailchimp campaign which went out at 07:30am.
In the space of 1.5 minutes, our server recieved 500 out of office replies, I can only assume that CSF Mailscanner was overwhelmed and possibly crashed.
 
Last edited:

keat63

Well-Known Member
Nov 20, 2014
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cPanel Access Level
Root Administrator
As a matter of interest, could exim (on a standard dedicated server), deal with this sort of influx.
500 emails in 90 seconds.
I'm aware that a number of factors will be down to resources and bandwidth etc.
 

keat63

Well-Known Member
Nov 20, 2014
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Root Administrator
In a blind panic, (after retsrting exim didn't resolve the issue), I just rebooted the server.
When I found the problem, there were about 150 emails awaiting processing.
I've no idea if it started processing after the reboot, as my main goal was to get it back up as quickly as possible.
So I disabled MSFE scanning and allowed the exim jobs to complete, then re-enabled MSFE scanning once caught up.

It's been fine since.
 
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cPanelLauren

Forums Analyst II
Staff member
Nov 14, 2017
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Hi @keat63
As a matter of interest, could exim (on a standard dedicated server), deal with this sort of influx.
500 emails in 90 seconds.
Theoretically, it should go over fine, though it could cause a short spike in resource usage.

Easily, IMO.
I've ran mailscanner & MSFE for many years and never has it crashed on me. If it did, there should be logs somewhere, and/or an email to root about it.
As an analyst I've seen a countless number of tickets regarding this behavior, while it may have never occurred with you it does happen. We have, internally a script that checks for its presence due to issues such as this. I'm glad you've not had any issues though.


Thanks!