08-12-2017 11:50 AM - last edited on 08-12-2017 12:15 PM by markp
If you receive a bad sender 550 error message when you try to send emails, it may be Microsoft have categorised the acccount as sending spam. This may have occurred because you inadvertently clicked on a link and picked up an infection.
Steps to take:
1) Complete a full virus scan on all devices (pcs, macs, smartphones etc.) containing the email account.
2) Change your email password.