Outlook.com email addresses rejecting email with 550 SC-001 (BAY0-MC1-F26)

EQ Admin

EQ Forum Admin
Staff member
If email from you to outlook.com and other Microsoft services such as Hotmail is blacklisted with error code 550 SC-001 (BAY0-MC1-F26) please take a few minutes to examine your outgoing mail logs. If you are an end user you may need to contact your ISP and ask them to check their outgoing mail server for signs of abuse. After stopping the abuse wait for the queues to clear and then use this form to contact Microsoft.