[Nottingham] imap is duplicating emails multiple times...

Martin martin at ml1.co.uk
Fri Jul 13 13:17:55 UTC 2012


On 13/07/12 13:42, Dan Caseley wrote:
> Any chance its being modified a step before? Provider-level mail
> sweeping or somesuch adding an extra header?

It's not anything extra in the mail itself or mail headers. For just one
example of replication:


43K 2008-12-30 16:33
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S

43K 2008-12-30 16:33
1250010333.M621378P25404V000000000000FC03I000000000091B818_4828.server01b,S=43522:2,S

43K 2008-12-30 16:33
1250010333.M621453P25337V000000000000FC03I000000000091B81C_4828.server01b,S=43522:2,S

43K 2008-12-30 16:33
1250010333.M621535P25352V000000000000FC03I000000000091B7E8_4828.server01b,S=43522:2,S

43K 2008-12-30 16:33
1250010333.M624071P25385V000000000000FC03I000000000091B819_4828.server01b,S=43522:2,S

43K 2008-12-30 16:33
1250010333.M629788P25378V000000000000FC03I000000000091B7E9_4828.server01b,S=43522:2,S

43K 2008-12-30 16:33
1250010333.M632896P25322V000000000000FC03I000000000091B7EA_4828.server01b,S=43522:2,S

43K 2008-12-30 16:33
1250010333.M632921P25361V000000000000FC03I000000000091B820_4828.server01b,S=43522:2,S

43K 2008-12-30 16:33
1250010333.M644382P25454V000000000000FC03I000000000091B81E_4828.server01b,S=43522:2,S

43K 2008-12-30 16:33
1250010333.M646139P25421V000000000000FC03I000000000091B815_4828.server01b,S=43522:2,S


And using "diff -qs" for those gives:

# for a in 1250010333.M6[234]* ; do diff -qs 1250010333.M60* "$a" ; echo
; done

Files
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S
and
1250010333.M621378P25404V000000000000FC03I000000000091B818_4828.server01b,S=43522:2,S
are identical

Files
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S
and
1250010333.M621453P25337V000000000000FC03I000000000091B81C_4828.server01b,S=43522:2,S
are identical

Files
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S
and
1250010333.M621535P25352V000000000000FC03I000000000091B7E8_4828.server01b,S=43522:2,S
are identical

Files
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S
and
1250010333.M624071P25385V000000000000FC03I000000000091B819_4828.server01b,S=43522:2,S
are identical

Files
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S
and
1250010333.M629788P25378V000000000000FC03I000000000091B7E9_4828.server01b,S=43522:2,S
are identical

Files
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S
and
1250010333.M632896P25322V000000000000FC03I000000000091B7EA_4828.server01b,S=43522:2,S
are identical

Files
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S
and
1250010333.M632921P25361V000000000000FC03I000000000091B820_4828.server01b,S=43522:2,S
are identical

Files
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S
and
1250010333.M644382P25454V000000000000FC03I000000000091B81E_4828.server01b,S=43522:2,S
are identical

Files
1250010333.M607281P25412V000000000000FC03I000000000091B7E1_4828.server01b,S=43522:2,S
and
1250010333.M646139P25421V000000000000FC03I000000000091B815_4828.server01b,S=43522:2,S
are identical



I'm suspicious that it might have something to do with the use of mobile
devices but I've nothing to go on.

One user reported seeing the mail replicate itself whilst watching
Thunderbird... However again, I've no idea whether it was Thunderbird
doing the replicating or just that Thunderbird was picking up mail
copies replicated by either imap itself or some other device replicating
the mail.

However, there's enough comment around the web to suggest this is some
repeated happening... But why and how and what's the fix?

Cheers,
Martin


> On Jul 13, 2012 12:34 PM, "Martin" 
> 
>     Folks,
> 
>     Anyone seen this one? There's various examples listed on the web but no
>     clear cause or solution detailed for what I've found...
> 
>     I'm running a cyrus-imap server (amongst others) and some users see
>     their emails replicated multiple times for particular mail folders. They
>     use Thunderbird and also whatever mobile device they have to connect
>     in...
> 
>     The replicated mail has exactly the same file contents, but with a
>     different imap generated file name.
> 
> 
>     This is on a system that works fine for most users and has been running
>     fine for some time now.
> 
>     Any ideas?



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