Sending email via SMTP using CURL

If you have trouble sending email via CURL functions, how about trying those options:

OptionUpload on
OptionVerbose on
OptionPort 587
OptionFTPSSL all
OptionURL smtp://server

This way, we get right port, use SSL, but with TLS upgrade on a normal smtp URL. Using SMTPS URL fails as it starts a SSL connection right away. For some server this fails as they need a normal SMTP start and later an upgrade to SSL.

PS: This way you can send email via MBS Plugin in both FileMaker and Xojo over Office 360 smtp servers from Microsoft.