POP3 Mail retrieved from O365 is changing alias address into primary address

Occasional Visitor



We have in our O365 environment some functional mailboxes where a primary address is set to ex. 




The alias is being set to :




Whenever a mail is sent in O365 to the alias, the to header is kept intact ( to: test.alias@test.be )


When that mail is retrieved via poP3 / 995 : it seems the to field is change to the primary address : test@test.be


Has anyone seen this behaviour?

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