Looks like a good plugin, but I cant use it

Apparently when hosting with 1and1 and trying to send mail via SMTP with 1and1, I have to select “none” for encryption and leave the port blank and then it is automatically routed wherever it needs to be going when using either “auth.smtp.1and1.com” or just plain “smtp.1and1.com”. Unable to test because I cant leave the port blank in this plugin… but the plugin looks really nice.