Resolved Gmail - undelivered mails, mails going to the spam folder

[danami]

I would also double check that its actually gmail or office server side that is moving the email to the spam folder and not an email client that is checking the mailbox via IMAP and running its own local junk rules to move the messages to the spam folder.

 

[hnizdod]

I really tried everything.
Multiple email addresses, multiple gmail/outlook addresses, multiple domains, email clients, ....

I also asked my friends to test delivery to their email addresses in gmail/outlook.

I'm accessing testing gmail/outlook addresses only from gmail.com/outlook.com. Not by email client.

That's why I'm writing that I'm mad about that.
I really don't know how to solve it.

 

[hnizdod]

It was OVH fault!!

I bought a server in another hosting company with same configuration. Everything works fine! All emails were delivered successfully.

OVH is the worst hosting company I ever seen. Support doesn't exist. Week of mad just because of them!
I think IP of the OVH VPS is blacklisted in lot of services.