Test a server!
You can test every type of server that talks TLS or StartTLS. You may e.g. enter:
- In the 'domain' field:
smtp://example.com:587and leave the 'port' field empty - In the 'domain' field:
example.comand in the 'port' fieldsmtp-587 - In the 'domain' field:
example.comand in the 'port' fieldxmpp-server-5269 - In the 'domain' field:
example.comand in the 'port' fieldxmpp-5222 - In the 'domain' field:
imap://example.comand leave the 'port' field empty - In the 'domain' field:
example.comand in the 'port' fieldimap-143 - ...or any plain TLS talking server/service