On 07/02/2014 05:25 PM, Stefan Michael Guenther wrote:
> Hello Martijn,
> 
> one of our clients receives encrypted emails with a single small text 
> attachment, send by some specialized appliance.
> 
> The problem is, that after decryption, the attachment seems to have 
> disappeared. Since the attachment only contains one or two lines of text, it 
> isn't helpful to compare the size of the email before and after decryption.

Do you have the MIME source of a message after decryption? or is it
completely empty?

Are there any error messages in the MPA log?

> Which loggers do I have to switch to debug to see, what happens to the 
> attachment?
> 
> Since there is a large number of other emails with attachments, which are 
> decrypted correctly, I doubt that it is a Djigzo problem. But at least we 
> have to proof it.

The first thing to find out how you can detect which mails should be
watched for. One option would be to add a matcher/mailet to config.xml
which matches for a specific recipient and then send a copy of the email
to some other address before and after decryption.

You might also do this in Postfix I think with recipient_bcc_maps

http://www.postfix.org/postconf.5.html#recipient_bcc_maps

Then if you have the message source before and after decryption we can
further analyse it

Kind regards,

Martijn Brinkers

-- 
CipherMail email encryption

Open source email encryption gateway with support for S/MIME, OpenPGP
and PDF messaging.

http://www.ciphermail.com

Twitter: http://twitter.com/CipherMail
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