Discover if the mail servers for ciresmail.colorado.edu can be reached
through a secure connection.
To establish a secure connection a mail server has to offer STARTTLS (SSL),
a trustworthy SSL certificate, support for the
Diffie-Hellman-Algorithm to guarantee Perfect Forward Secrecy and
must not be vulnerable against the Heartbleed attack.
Futhermore we recommend using end-to-end encryption with
We have not received any emails from a @ciresmail.colorado.edu address so far.
Test mail delivery
First seen at:
CN=mx.colorado.edu,OU=Unified Communications,OU=Hosted by University of Colorado at Boulder,OU=Office of Information Technology,O=University of Colorado at Boulder,street=455 UCB,L=Boulder,ST=CO,postalCode=80309,C=US