How to remove / DELIST IP From Microsoft blacklist after spam attack

Microsoft has 2 major anti spam systems which work’s separately

Office 365 – Which include all the 365 systems

Hotmail – Which include the free systems like,, etc.

in order to request de-list from black list you first need to make sure your server is clean :

check for RBL listing :

MXtoolbox -

Hetrix -


The check for open relay

mxtoolbox -

DNSgoodies -

After all is well you can ask for de-list :

office 365 -

hotmail -

Good Luck

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