I used to have an old PHPMailer and it worked well, but since PHPMailer developers did an upgrade, my old package stopped working, it required me to upgrade and I did. But as the athletic association has a different domain, it requires to enable SMTP...
There are a lot of free developer-friendly mail services providing their APIs but what about a customers? You need also to easily create new mailboxes, send/receive emails, view analytics. Do you use own solution, any hosting or may be combining mult...