External replier being asked for OUR server credentials

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Al-MacLean
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Joined: Fri Sep 01, 2006 5:32 pm
Location: UK
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External replier being asked for OUR server credentials

Postby Al-MacLean » Mon Feb 11, 2019 2:18 pm

Hi,
We have an external sender (different domain, a business customer) replying to one of our emails but is being asked to provide login details to *our* server while composing their reply to us.

They sent a screen-shot through to illustrate they were not doing anything weird - just a regular email reply (using Outlook as edit client) with the message in background and a prompt for login to our Zimbra box on top.

The only thing I've thought of so far is maybe our company logo image in our signature (included within their reply) is being requested from our server rather than being embedded in the original message (in base64, or whatever), so is prompting for permission to retrieve it to add to the reply body? (Only a guess.)

Has anyone else come across this odd behaviour and maybe discovered an explanation for what's occurring? (Possibly also with a known solution? ;) )

Cheers,

Alec


Al-MacLean
Posts: 21
Joined: Fri Sep 01, 2006 5:32 pm
Location: UK
Contact:

Re: External replier being asked for OUR server credentials

Postby Al-MacLean » Mon Feb 11, 2019 3:31 pm

Should have noted previously that we are still on 8.6 Community on a Ubuntu 14.04 LTS host (as a VM).

zmcontrol -v output:
Release 8.6.0.GA.1153.UBUNTU14.64 UBUNTU14_64 FOSS edition, Patch 8.6.0_P11

Just in case that makes any difference...
pup_seba
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Outstanding Member
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Joined: Sat Sep 13, 2014 2:43 am
Location: Tarragona - Spain

Re: External replier being asked for OUR server credentials

Postby pup_seba » Mon Feb 11, 2019 3:41 pm

Hi,

I did not faced such issue, but your guessing makes sense. Can you run some tests like sending an email without the signature and replying to it? Just to pin the problem to some sort of permission access to any of the elemnts in the signature.
Sebastián Greco
Infrastructure Developer @https://www.essiprojects.com/

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