Hi,
this morning I came in to this error within the queue (and a bounceback my boss gave me).
First I started freaking out. But TBH, after testing I think it’s on their end. Here’s what I’ve done so far:
I did a MXToolbox lookup on our domain (as I do every once in awhile), and we are not blacklisted. I did the same for theirs, and they are.
Our email IS NOT routing out through a spam filter. It IS routed through the filter for receiving.
I did some updates, and tried rebooting the exchange server. It was about time for updates anyway. No difference. Tried retrying the message of course.
Now, the bouncebacks are delayed. I tried one from my gmail and I didn’t get a bounceback. That doesn’t mean it went through. It might be delayed.
I called the lady on the other end and she sent me one, and it came through immediately.
I then replied as well as sent a single one, and neither went through. At this time, none have gone through as of yesterday.
The thing is: I’m able to email everyone else…even outside the network, with no delay and no issues.
I have zero complaints, except for this one domain. And as I said, their domain is blacklisted.
Now regarding that: if it’s blacklisted, there’s a better chance we would have their emails blocked on our end, but not the other way around.
So that’s where I’m confused.
So I found a site that recommended “Use the External DNS Lookup settings on the transport server.” But that made no difference. I’ve thus left this option checked. I did manually try sending the emails again. I also right clicked on the domain in the mail queue and hit retry.
I’m at a loss of what to try here.
Nothing has changed. I think it’s their issue. Am I crazy?
