Exchange is Blocking email with attachments at random.

I am running Exchange 07 and 03.They are on 2 separate domains on the same lan.There is a connector setup so that each domain can receive emails from the other.My problem here lately is that users on the 07 exchange are complaining that they are not getting emails from clients if the client is sending an attachment.There is no size issue.They will however receive email from the same client if there is no attachment.
jaxnmjAsked:
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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
Do you have a Sonicwall Firewall?
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jaxnmjAuthor Commented:
I have A sophos email appliance that's supposed to filter spam.I seem to keep getting all of the Viagra type emails and not receiving the legit ones though.
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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
I have seen these types of appliances strip encrypted or password protected attachments or basically any type of unscannable attachments.    What is your inbound attachement policy set to?

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jaxnmjAuthor Commented:
Here's what they're set at.
Sophos.png
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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
For Suspect Attachements to all the Turn Off button if you click that does it then say Turn On?
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jaxnmjAuthor Commented:
yes
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jaxnmjAuthor Commented:
Hey, one quick thing,Is there a feature in this appliance where you can log into the console and allow senders that it normally has been blocking or "finds offensive" for some unbelievable reason?
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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
Yes if you have the ability to whitelist users that should work also.     My guess is your app is stripping attachements it cant scan.   How setting this to off for:   Suspect Attachements, but this does not sound like a good thing since there are a few email born malware out there...
 
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jaxnmjAuthor Commented:
The Staff that are not getting attachments just happen to be the CEO's wife,The Head Of Human resourses and my Boss.How convenient huh? any suggestions? I mean, wouldn't our network antivirus catch this?
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Rick FeeMessaging Engineer - Disaster Recovery EngineerCommented:
Ha yes that is typical and it is probably some silly joke email...well i would say click the button for Suspect Attachemets so it says Turn On...have them send the same email and see if this resolves your issue so you know if the problem lies with this setting.   Or whitelist the email address they are sending from.
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