> there is a feature in O365 that forwards mails (in/out/both..) to an 
> archive-mailbox for long-term archiving.
> 
> We grab this mails via pop. However our available mail-readers (Thunderbird, 
> Kopano) show the original mail as attachment.
> 
This is the „envelope wrapper“ format. It contains the _final_ recipient(s) of 
the email (eg after aliasing, distribution list expansion etc), and contains 
the original email - headers and body - unchanged. The advantage is that the 
archiving process does not need to do any of the logic Exchange does (no 
further LDAP lookups etc).

> This makes it very hard for handling/searching/reading of these mails.
> 
> Are there any tools available to just have the attachment that is the real 
> and original mail?
> 
These messages are typically read by an email archiving solution (mailpiler, 
mailarchiva, cryoserver, mailstore etc) for long-term storage, full-text search 
and other features.

— Matthias

-- 
Matthias Leisi
Katzenrütistrasse 68, 8153 Rümlang
Mobile +41 79 377 04 43
[email protected]
Skype matthias.leisi

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