This article is intended for senders of bulk emails to BT customers. If you are a BT business customer or a customer using mailing lists to send bulk emails, you should follow this advice.
BT aims to deliver emails customers want and block those they don’t. To help your emails reach their destination, follow these best practices.
Improve email security
BT uses DMARC to block fake or suspicious emails:
- add a Sender Policy Framework (SPF) record to your domain.
- use DKIM and DMARC to authenticate your emails.
- separate marketing and transactional emails.
- use a consistent “From” address.
If your email bounces, contact your provider or email BT at postmaster@btinternet.com.
Find out more about DMARC at https://dmarc.org
Manage your mailing list
A clean list improves delivery:
- send emails at the frequency you promised
- remove inactive or invalid addresses
- include unsubscribe links
- avoid sending to users who haven’t opted in
Check your email content
Even with correct setup, poor content can cause issues:
- avoid spam-like language or formatting
- include clear subject lines and sender details
- review error messages from BT servers and fix issues
Secure your email system
Keep your system safe to avoid being blocked:
- show the sender’s IP address in headers
- protect against unauthorised access
- monitor for unusual sending patterns
Get More Help
Visit M3AAWG Best Practices for more guidance. If you still have issues, email postmaster@btinternet.com.
Fixing email sending and receiving problems
If you can’t send or receive emails, try these steps.
Quick Fixes
- Log out and back into BT Email.
- Send a test email from BT Webmail.
- Check your email app settings.
- Make sure the email address is correct.
- Look in your spam or junk folder.
Check for Delivery Errors
If you get a failed delivery message:
- read the error message carefully
- messages from “MAILER-DAEMON” or “Mail Delivery Subsystem” often explain the issue
- fix any problems mentioned in the message
Review Your Settings
- Check blocked senders in your email settings.
- Review auto-forwarding rules.
- Look at filters or rules that may move emails to Trash or other folders.
Still Need Help?
Visit the BT Community for advice.
Contact our Guides for technical support.