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  • high # of bounces?
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Author Topic: high # of bounces?  (Read 2647 times)

adixon

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high # of bounces?
September 03, 2009, 03:55:02 am
I've got three clients all happily using UAS, but one of them [fairvote.ca] is reporting that twice in the past week, his mailouts have had approx. 50% bounce rates. In both cases, he resent them [identically], and they went out with a normal 1-2% bounce rate. When I looked in the civimail report, almost all the bad bounces were of type 'unknown', so that wasn't very helpful.

Has anyone else had a similar experience recently? The only change at this end was a recent upgrade from Drupal 5/CiviCRM 1.9 to Drupal 6/CiviCRM 2.2, which in other respects has worked well.

shane

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Re: high # of bounces?
September 03, 2009, 10:58:56 am
Hi Allan,

could you please tell us specific dates/times for the mailings that failed and for the ones that were a repeat that had normal bounce rate.
and also please tell us how many bounces for each mailing there were.

we'll check our logs and see if we can help figure this out.

thank you,

Leyla

-- CiviSMTP Support

adixon

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Re: high # of bounces?
September 08, 2009, 09:32:32 am
Hi Leyla:

Here are the reports. The time is EDT, so you probably want to add 3 hours for your time zone.

Here's the first failed one:

Intended Recipients   10080
Succesful Deliveries   8639 (85.70%)
Spooled Mails   0
Tracked Opens   1637
Click-throughs   160
Forwards   0
Replies   20
Bounces   1445 (14.34%)
Unsubscribe Requests   41 (0.41%)
Scheduled Date   August 24th, 2009 12:28 PM
Status   Complete
Start Date   August 24th, 2009 12:30 PM
End Date   August 25th, 2009 2:32 AM

and it's successful resend:

Intended Recipients   10012
Succesful Deliveries   9564 (95.53%)
Spooled Mails   0
Tracked Opens   1977
Click-throughs   124
Forwards   0
Replies   15
Bounces   452 (4.51%)
Unsubscribe Requests   50 (0.50%)
Scheduled Date   August 25th, 2009 9:27 AM
Status   Complete
Start Date   August 25th, 2009 12:16 PM
End Date   August 25th, 2009 7:11 PM

The second unsuccessful one

Intended Recipients   1396
Succesful Deliveries   738 (52.87%)
Spooled Mails   0
Tracked Opens   170
Click-throughs   11
Forwards   0
Replies   1
Bounces   658 (47.13%)
Unsubscribe Requests   4 (0.29%)
Scheduled Date   September 2nd, 2009 8:50 AM
Status   Complete
Start Date   September 2nd, 2009 9:00 AM
End Date   September 2nd, 2009 9:34 AM

and it's successful resend.

Intended Recipients   1391
Succesful Deliveries   1344 (96.62%)
Spooled Mails   0
Tracked Opens   340
Click-throughs   32
Forwards   0
Replies   3
Bounces   48 (3.45%)
Unsubscribe Requests   1 (0.07%)
Scheduled Date   September 2nd, 2009 12:27 PM
Status   Complete
Start Date   September 2nd, 2009 12:30 PM
End Date   September 2nd, 2009 1:14 PM

shane

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Re: high # of bounces?
September 16, 2009, 10:30:34 pm
sorry for a delayed response.

we checked our logs for the above dates and here's what we have for those mailings:

Aug 24-25th failed mailing, id 782:

  we had 446 bounces in our logs. in your civimail report for your mailing you had 1445

Aug 25th successful mailing, id 783:

  we had 450 bounces in our logs. civimail report - 452

mailing id 789, September 2nd failed mailing:

  20 bounces.  civimail report - 658 bounces.

Sept 2nd successful mailing, id 790:

  48 bounces in our logs. civimail report - 48 bounces.

As you can see for failed mailings the number of bounces that went through our system is much lower than what you see in the civimail report.

This is likely because the excess bounces were generated by civimail due to some error during mailing and is probably why they are all of type 'unknown'

It could be that the connection to the smtp server was dropped during the mailing.

If this becomes a consistent problem for you and your client we'll have to look into providing some batching mechanism for your civimail.

-Leyla

adixon

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Re: high # of bounces?
September 21, 2009, 02:08:47 pm
okay, thanks, we'll keep an eye out ...

echoleaf

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Re: high # of bounces?
November 03, 2009, 07:54:51 am
I just ran the first mailing for a client and the bounce rate was 33%.  All were Invalid with reason Unknown.  It seems very high but I am not sure if they are old emails or what.  I just wonder because of the 'Unknown' factor - there should be a reason for a bounce, no?  Thank you.

echoleaf

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Re: high # of bounces?
November 04, 2009, 01:25:05 pm
This was fun to find out - all but one of the emails sent to the clients own domain were failures.

adixon

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Re: high # of bounces?
November 05, 2009, 04:26:32 am
i'll hazard a guess that your DNS MX record isn't setup properly.
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  • high # of bounces?

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