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Email Protection corrupts incoming SMIME Mails

Hello,

we are using Sophos UTM 9.1 as an virtual Appliance.

I have the following scenario:

Incoming mails->NoSpamProxy->UTM->Exchange2010

In this scenario when a user gets an smime encrypted Email it is shown in Outlook (2010) as an normal (Text)Email with attachment, but the attachment is invisible.

When i change the routing, so the NoSpamProxy delivers directly to the Exchange, the mails are shown properly and the attachment is visible.

Also when i configure an exception for the sender address under EmailProtection->SMTP->Exceptions and set to skip "footer additions" checks the incoming mails will be fine.

is there something i am configuring wrong?

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0 ru3pp3l over 11 years ago

I have tested around a bit and found out, that when i attach a simple .txt file into an encrypted mail it works just fine.

when there is a .pdf file in the attachment the encrypted mail wont be forwarded properly an i have to exclude the footer additions check in the exceptions. then it will work.....

any suggestions?
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0 BAlfson over 11 years ago

What happens if you take the NoSpamProxy out?

Cheers - Bob

Sophos UTM Community Moderator
Sophos Certified Architect - UTM
Sophos Certified Engineer - XG
Gold Solution Partner since 2005

MediaSoft, Inc. USA
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0 ru3pp3l over 11 years ago in reply to BAlfson

hi,

take out the NoSpamProxy didnt help.....

i opened up up a case at Sophos. Lets see what will happen....

thanks
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Email Protection corrupts incoming SMIME Mails

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