STARTTLS Test
Verify that an SMTP server advertises and successfully negotiates STARTTLS.
What DomainPulse checks
EHLO advertisement, STARTTLS response, TLS handshake, negotiated protocol and cipher.
Common problems
Missing advertisement, rejected upgrade and TLS handshake failures.
FAQ
Is advertised STARTTLS enough?
No. DomainPulse also performs the TLS handshake.
Is TLS 1.0 accepted?
The scanner requires modern TLS 1.2 or later.