BT Business home
Business

My emails are being rejected - I'm getting messages with the error code 550. What should I do?

There are several possible reasons for this.

Your email is being identified as spam.

If you're getting the message: 550 Message rejected due to sender IP reputation ([86.xx.xx.xx]) this might be because your email is being rejected as spam by the BT network.

This might be happening because:

  • you have a virus on your computer or email server. Try these links to help you identify and clear any problems:

              http://www.malwarebytes.org/

              http://www.superantispyware.com/

              http://www.mcafee.com/us/downloads/free-tools/how-to-use-stinger.aspx

  • your emails are bigger than our maximum size limits
  • you're sending emails to people who haven't opted to receive them

If you're using your own email server, make sure it is not set to Open relay.

There’s a problem with your SMTP authentication.

If you're getting an error message saying Recipient not authorised, you may need to change the SMTP server for the mail account you're sending from.

To do this in Internet Explorer, select: Tools>Accounts>Account name>Properties Servers.

  • Bookmark and Share


Sorry for interrupting your journey

We're working on improving our website so you get the information you want quickly. Please help us by providing your phone number. We apologise for the short delay and thanks for your patience.

Please enter a valid UK Phone number (note: numbers need to start with 0 and contain 10-11 numbers).

Reason for your visit.



Please wait...

There may be a quicker way...

Online tools

Follow the same steps online as our call centre agents:

Chat with us online

It's often quicker. We can even fix problems on your PC while you watch.
Start an instant chat session:

For an email problem, start an instant online chat session now
It's often quicker and we can even take control of your computer to sort out your problem while you watch.

Please wait...