We have several mail forwarders (we call them aliases in my day job) set up on our Reclaim account, and they’ve been working fine for quite a while. Today, however, after replying to a conversation, using one as the From address, I got this bounce-back message:
From: Mail Delivery System <Mailer-Daemon@devo.reclaimhosting…>
Date: Wed, Feb 20, 2019 at 10:45 AM
Subject: Mail delivery failed: returning message to sender
To: <[my personal Gmail address](mailto:my personal Gmail address)>
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
[my personal Gmail address](mailto:my personal Gmail address)
(ultimately generated from [the mail forwarding address](mailto:the mail forwarding address))
Domain [our domain](our domain, curiously without SSL…) has exceeded the max defers and failures per hour (5/5 (100%)) allowed. Message discarded.
While composing this topic, the system suggested that it’s similar to Delay or Non Delivery of Email Forwarding Addresses - #2 by timmmmyboy, where it says that you allow 25 messages per hour. 25 seems more reasonable to me than 5.
And, is there anything else I should investigate? Is there a problem with the mail system receiving messages at that address, or with me sending messages from it?