Domain Mail on Plesk - MX on Cloudflare Routing issue

Website, Application, Performance Getting Started
7

@sdayman , I use mailgun for SMTP
Here is the test

 tarting SMTP test of: smtp.mailgun.org

0.00s
Resolved IP address to: 44.231.238.210
Connection: opening to 44.231.238.210:25, timeout=15
Connection: opened
0.07s
< 220 Mailgun Influx ready
0.17s
SMTP connection established

EHLO www.wormly.com
< 250-smtp-out-n05.prod.us-west-2.postgun.com
250-AUTH PLAIN LOGIN
250-SIZE 52428800
250-8BITMIME
250-SMTPUTF8
250-PIPELINING
250 STARTTLS
0.27s
MAIL FROM:[email protected]
< 550 5.7.1 Relaying denied
0.37s
SMTP ERROR: MAIL FROM command failed: 550 5.7.1 Relaying denied
RCPT TO:<f****@*****.**m>
<
SMTP ERROR: RCPT TO command failed:
SMTP Error: RCPT TO command failed