SMTPAUTH

From Qmail-LDAP Wiki

Enables SMTP-AUTH for remote clients. Authenticated clients are allowed to relay through this server and their login is being recorded in the received line.

Default:

off

Affects:

qmail-smtpd

Example:

"TLSREQUIRED" or "" (any value will do)

Note:

• With SMTP-AUTH remote users can use this mail server for relaying.
• SMTP is unencrypted and auth passwords are in clear text equivalent base64 encoding.
• With TLSREQUIRED enabled SMTP-AUTH is only accepted when the SMTP session is TLS encrypted to prevent password sniffing.
• TLSREQUIRED requires TLS option to be compiled into qmail-ldap.