Hi,

Anyone has this issue too?

Before implementing Cloudflare, all email functions work well:
a. Webmail
b. OsClass email
c. Email client (Thunderbird)

After implementing Cloudflare,
a. only Webmail works
b. OsClass email does not work
c. Email client (Thunderbird) does not work

My DNS settings in Cloudflare (screenshot):
   MX record is pointing at the mail subdomain, Unproxied (DNS only)
   A record "mail" is pointing at the IP address, Unproxied (DNS only)

Appreciate if you have a solution to this, thank you!

Update:

c. Email client (Thunderbird) works now. Reason: I have managed to correct it after realising there are two different places for SMTP server name (!).


Now, I really hope to get the Email server to work. Appreciate any advice please. Thank you!

This is question on hosting & cloudflare.
I remember when using cloudflare, it was required to update some DNS records related to mailing service (smtp) as it was not working as well.