Tuesday, 13 May 2014

Office365 – Distribution list blank return path

When you are using Office365, you may find that external email addresses in a distrbution list do not recieve mails sent to the distribution list email address.

Many spam filters will block emails with a blank or empty return path, but Office365 sets this blank as default, to prevent email bounce loops.
This is normal behaviour – a large distribution list shouldn’t distribute a bounce/DSN report to the entire membership.
For a single membership list for use with Zendesk, Help Scout or other similar mailbox monitoring applications, it may be necessary. - See more...

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