Office 365 Smtp Relay Stopped Working

Testing the office 365 smtp relay connector with powershell.

Office 365 smtp relay stopped working.

August 2017 office 365 exchange online. I also tried using the smtp server ip address instead of the domain name and tried using port 25 as well. This person is a verified professional. Microsoft 365 or office 365 smtp relay does not require the use of a licensed microsoft 365 or office 365 mailbox to send emails.

After three days of troubleshooting i finally figured it out. Before you get started testing first ensure you know what. Microsoft 365 or office 365 smtp relay has higher sending limits than smtp client submission. Senders are not bound by the 30 messages per minute or 10 000 recipients per day limits.

Had a client whose smtp server suddenly stopped sending scan to e mails to their domain cloud office 365 e mail from their on premise smtp server. Relaying email via office 365 suddenly stopped working. A common reason for issues with microsoft 365 or office 365 smtp relay is a blocked ip address. After creating the connector prepare to test it out.

The queue folder quickly filled up with over a hundred e mails so what could have caused this problem. In this section we ll create some powershell scripts to allow you to easily ensure the connector is working properly. I have two different unrelated office 365 that have stopped taking smtp over the last three or four days. Office 365 smtp relay quit working.

I also tried setting the dns domain name field with office 365 domain name as recommended is some reddit page but the problem still persists. We have not changed any tls settings or enabled disabled any ciphers in the past few months. Thank them all for helping but it s not you. This can be caused by a number of issues.

The remote smtp service rejected auth negotiation. I took about 45 minutes after submitting the form for office 365 to start accepting emails relayed from this ip address.