[leuppolo]

Originally Posted by TenFour

Possibly some ideas in this previous thread would be helpful: http://www.emaildiscussions.com/showthread.php?t=79101

And, also this blog post on Fastmail: https://fastmail.blog/advanced/what-...-spam-folders/

I have rechecked the DNS configurations and all seems ok... Maybe have I to edit the suggested records by FastMail for my custom domain?

Originally Posted by hadaso

It looks as if there are dedicated smtp clients for new customers, and they might be blocked by some major email providers, perhaps because some new customers manged to send some spam out before being caught...

I have got the same impression! Unfortunately, in this way, I cannot evaluate the services (continue I to subscribe with FM or other providers?) when the delivery delay is 4 hours for a very very simple test e-mail.