2022-10-25 09:51:28 1onEic-00BKVO-QK ** [email protected] R=dnslookup T=remote_smtp H=mxa.mailgun.org [34.150.216.144] X=TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_128_GCM:128 CV=yes: SMTP error from remote mail server after RCPT TO:[email protected]: 550 5.0.1 Recipient rejected
mx records are send to mxa.mailgun.org for some reason
Delete both mx records for max.mailgun.org