Mailgun: Messages “Accepted” but taking long time to be delivered (or not being delivered)

Question

I\'m using Mailgun for a site I maintain, usually Mailgun works great, but I am encountering a strange problem. My script calls the HTTP API to send messages using Mailgun, thes

Answer 1

Whenever a message shows as "Accepted" in the Mailgun logs this indicates that Mailgun has accepted the message and queued it for delivery. The message should be delivered fairly quickly, however it can be queued for a bit of time if you submitted a large amount of messages at once or if the recipient ESP is throttling messages from the IP/domain on your account.

I'd recommend opening a support ticket via your Mailgun account and provide some of the message-ID's so the support team can investigate the exact cause of these delays once the message is submitted to Mailgun.