libnet-smtp-tls-perl 0.12-3 (amd64 binary) in ubuntu cosmic

 Net::SMTP::TLS is a TLS and AUTH capable SMTP client library which offers an
 interface that users will find familiar from Net::SMTP. Net::SMTP::TLS
 implements a subset of the methods provided by that module, but certainly not
 (yet) a complete mirror image of that API.