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Mailman delete email on Office 365 POP3

May 09 '15 at 09:01

I can only connect with POP3 to our Office365 account and when I try to delete an email I get the message:

No X-UIDL header found

If I understand the documentation correctly this is necessary (among other things) for deleting emails.

Is there a reason why Mailman isn't getting any X-UIDL headers from Office365 and/or is there another way of deleting emails?