Email server settings
BT Mail SMTP, IMAP & POP3 settings
Use these settings to add your BT Mail account (btinternet.com, btopenworld.com, talk21.com) to Outlook, Apple Mail, Thunderbird, your phone or any app that sends email over SMTP.
Incoming mail
IMAP
- Server
- mail.
btinternet. com - Port
- 993
- Security
- SSL/TLS
- User name
- full email address
- Authentication
- Normal password
Incoming mail
POP3
- Server
- mail.
btinternet. com - Port
- 995
- Security
- SSL/TLS
- User name
- full email address
- Authentication
- Normal password
Outgoing mail
SMTP
- Server
- mail.
btinternet. com - Port
- 465
- Security
- SSL/TLS
- User name
- full email address
- Authentication
- Normal password
How to set up BT Mail in a mail app
- Choose add account → manual setup (or “other account”) in your mail app.
- Enter your full BT Mail address and password.
- Pick IMAP for incoming mail and enter the server, port and security from the table above.
- Enter the SMTP server for outgoing mail (mail.btinternet.com, port 465) and enable authentication with the same login.
If the login keeps failing, check that IMAP/POP access is enabled in the BT Mail web settings, and use an app password if your account uses two-step verification.
Email domains using these settings
btinternet.com, btopenworld.com, talk21.com.
Settings from the Mozilla Thunderbird ISP database (MPL 2.0), which mail clients use for automatic setup.
BT Mail settings: FAQ
What is the BT Mail SMTP server?
What are the BT Mail IMAP settings?
Should I use IMAP or POP3?
Why does my BT Mail login fail in a mail app?
Email validation API
Validate btinternet.com addresses before you send
emailvalidation.io checks syntax, MX records and the mailbox over SMTP, flags disposable, role and free addresses and returns a quality score, in one request.
/v1/info Email validation API Read the documentation
100 free validations every month. No credit card required.
GET https://api.emailvalidation.io/v1/info?
{
"email": "support@emailvalidation.io",
"user": "support",
"tag": "",
"domain": "emailvalidation.io",
"format_valid": true,
"mx_found": true,
"smtp_check": true,
"catch_all": null,
"role": true,
"disposable": false,
"free": false,
"score": 0.64,
"state": "deliverable",
"reason": "low_quality",
"did_you_mean": "",
"catch_all_resolution": null,
"bounce_probability": null,
"status": "valid",
"sub_status": "role_based",
"explanation": "The mailbox exists, but it is a role address (such as info@ or support@), usually read by a team rather than one person.",
"recommended_action": "send_with_caution"
}