Forum Discussion
DiVojich
Dec 10, 2019Brass Contributor
Email address is constantly blocked
Hi all, looking for advice regarding blocked email addresses. In protection.office.com/restrictedusers I have 1 email address that is being blocked every 48h. The issue is, this is really importan...
oliwer_sundgren
Dec 10, 2019Steel Contributor
Hello! DiVojich
How is the mail address sending these bulk emails? Is it over port 25 ( Un authenticated SMTP )
Or bort 587 ( Secure SMTP )
We need this information to assist further.
Basic Anonymous mail over port 25 usually gets blocked in these bulk scenarios.
Kind Regards
Oliwer Sjöberg
- DiVojichDec 12, 2019Brass Contributor
Hi, it is port 587oliwer_sundgren