Hi SerenityNow
I also have something like the same issue. I am finding that outgoing emails are working fine (IF I can get into Roundcube, which around 80% of the time returns a 524 error), but incoming emails are being returned to sender as
" SMTP error from remote mail server after RCPT TO:<[email address](mailto:email address)>:
550 5.1.1 Address does not exist."
I have also contacted my Hosting Company who are adamant that there is no issues on their end and that no support tickets are being sent in regards email connectivity.
This issue has arisen recently, as I have been using Cloudflare successfully for well over a year without issues and have touched no settings in that time, with emails having no issues.
Even if we could remove emails from Cloudflare until issues are addressed, at least we could operate our email systems. Can anyone please advise how this can be done ?