[Mimedefang] Problem receiving multiple messages with the attachment truncated at various sizes from a slow connected mail server

[Richard Cooper]

> We keep receiving the same message every 30 mins.  Their link is 
> reportedly slow but I don't really know
> where to start looking for this problem.  The total message 
> size is under 
> 500kb.
> 
> We get around 4 to 5 thousand messages a day and do not see 
> any others 
> with the same problem!
> 
> Has anyone else encountered this problem before ?

I had the same problem when I was using Surf Control for SMTP as my mail scanner. Every now and again it would send the same mail every 30 minutes for a random period of time - sometimes a few hours, sometimes a week. 
I'm sorry to say that I never solved the question of why it was doing it, but it definitely came from the Surf Control machine as the headers were always exactly the same.
To be honest I really have no way of knowing if the same thing happened with any of our outgoing emails, so although its a long shot could they be running Surf Control at the other end? 
I can only assume it was caused by sending the message but not receiving a 'message received signal' back (but that is a guess).

Cheers
Ric

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