new The method "new" of Net::SMTP is now able to start directly with SSL when the argument "<SSL =" 1>>
is given. In this case it will not create an IO::Socket::INET object but an IO::Socket::SSL object.
One can give the usual "SSL_*" parameter of IO::Socket::SSL to "Net::SMTP::new".
starttls
If the connection is not yet SSLified it will issue the STARTTLS command and change the object, so
that SSL will now be used. The usual "SSL_*" parameter of IO::Socket::SSL will be given.
peer_certificate ...
Once the SSL connection is established the object is derived from IO::Socket::SSL so that you can use
this method to get information about the certificate. See the IO::Socket::SSL documentation.
All of these methods can take the "SSL_*" parameter from IO::Socket::SSL to change the behavior of the
SSL connection. The following parameters are especially useful:
SSL_ca_path, SSL_ca_file
Specifies the path or a file where the CAs used for checking the certificates are located. This is
typically "etc/ssl/certs" on UNIX systems.
SSL_verify_mode
If set to 0, verification of the certificate will be disabled. By default it is set to 1 which means
that the peer certificate is checked.
SSL_verifycn_name
Usually the name given as the hostname in the constructor is used to verify the identity of the
certificate. If you want to check the certificate against another name you can specify it with this
parameter.