Here is how to solve the following error message: Domain has an outgoing mail hold. Message will be reattempted later.
![Domain has an outgoing mail hold. Message will be reattempted later. image 4 - Domain has an outgoing mail hold. Message will be reattempted later.](https://i0.wp.com/pcx3.com/wp-content/uploads/2021/09/image-4.png?resize=669%2C632&ssl=1)
grep the cPanel username / email address and if found remove it from the following files:
/etc/outgoing_mail_hold_users
/etc/outgoing_mail_suspended_users
/etc/email_send_limits
Or via WHM API:
whmapi1 unsuspend_outgoing_email user=USERNAME
whmapi1 release_outgoing_email user=USERNAME