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 hotmail.com, live.com, outlook.com 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 - https://mxtoolbox.com/blacklists.aspx

Hetrix - https://hetrixtools.com/blacklist-check

DNSBL - https://www.dnsbl.info/dnsbl-database-check.php

The check for open relay

mxtoolbox - https://mxtoolbox.com/diagnostic.aspx

DNSgoodies - http://www.dnsgoodies.com/

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

office 365 - https://sender.office.com/

hotmail - https://support.microsoft.com/en-us/supportrequestform/8ad563e3-288e-2a61-8122-3ba03d6b8d75

Good Luck

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