Kindly help me, My Sever Hosted with GoDaddy VPS. I have facing problem with GMAIL.
Somewhat we have send to Gmail & Somewhat we have unable to send mail to Gmail.
Unable to find problem.
My Email Message Delivery Failure as Follows
From: firstname.lastname@example.org [mailto:email@example.com]
Sent: Saturday, July 14, 2018 11:23 AM
Subject: Message Delivery Failure - Mail Delivery System
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients was aborted after 20.6 hour(s):
Reason: There was an error while attempting to deliver your message with [Subject: "Artificial Intelligence Training Requirement "] to firstname.lastname@example.org. It has been in queue too long, and will not attempt delivery again.