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Email Protocols

What IMAP, POP3 and SMTP mean, and the exact ports to use.

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IMAPPOP3SMTP

IMAP (recommended)

IMAP keeps your mail on the server and in sync across every device, read a message on your phone and it shows as read on your computer too.

Servermail.your-domain.com
Port993
EncryptionSSL/TLS
UsernameYour full email address

POP3

POP3 downloads mail to a single device and can remove it from the server. Only choose POP3 if you use one device.

Servermail.your-domain.com
Port995
EncryptionSSL/TLS
UsernameYour full email address

SMTP (sending)

SMTP sends your email. It always requires authentication with the same login as your incoming account.

Servermail.your-domain.com
Port465 (SSL) or 587 (STARTTLS)
AuthenticationRequired, full email & password
Never use port 25. Many networks block it. Always use 465 (SSL) or 587 (STARTTLS) to send.

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