Mail never finishes sending?

Trying to help solve a problem with my dad's Mac that has stumped me. Frequently — several times a month at least, possibly more — Mail has a "Sending Message" notification at the bottom of sidebar for just hours on end with a large file size, like this:



When he quits Mail and restarts, the send (usually) does not resume. But more often than not he doesn't notice this, and it eats up tons of his limited 10GB/mo bandwidth (lives in the boonies, satellite internet).


A couple years ago, when this first happened, I discovered several dozen copies of a huge message Mail tried and failed to send, over and over again, so maybe that's what's happening every time. (There was a video attached to those — he didn't know any better — see screenshot below.) But why would Mail get stuck like this so often?



Here's the screenshot mentioned above:

Posted on Jun 12, 2020 8:27 PM

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24 replies

Jul 9, 2020 5:07 PM in response to BDAqua

>Yes, the limit is at the Mail Provider's end, disconnect from the Internet & wait for Mail to say it can't send, then choose edit & delete them.


Well, this didn't work. Dad had a Sending Message: 103.3MB at the bottom of Mail today, so I had him turn off his wifi, change his Energy Saver to keep awake for an hour (so Mail could continue trying to send), then checked back with him after 55 minutes, and mail was still trying to send. I'm assuming an hour would have been long enough for Mail to figure out there was no internet.


The curious thing is, if he quits mail, it doesn't try to send again when he starts it back up. Also, when this notification is present, there is no Outbox, so it's not possible for him to find whatever message is the culprit.


So I'm back hoping for new suggestions.

Jul 10, 2020 2:01 PM in response to BDAqua

BDAqua wrote:

I've not seen a way to interrupt it other than force quitting Mail. it should time out & ask if you want to edit it or try later!???

You'd think so, wouldn't you? I mean, it should do that without taking any additional action, like disconnecting from the internet. But as noted above, we did disconnect from the internet, and an hour later it was still Sending Message: 103.3MB.


This wouldn't be so bad if quitting put the failed send back into the Outbox, where we could get at it. But it never does. Sometimes quitting means we never see that sending banner again (for that particular message), but sometimes it starts right back up again after re-launching Mail.

Jun 14, 2020 11:26 PM in response to BDAqua

That makes total sense, BDAqua. We'll try that. Thanks!


Mail Drop is beyond him, and besides these are always FWD:FWD:FWDs from other 20th-century folks of some entire webpage someone though was funny and copy-pasted into an email because they didn't know how to just send a link. I've tried to get him to stop, but his way of "stopping" is to just not include me in the FWD so I don't know he's doing it. Grrr. (At least he knows better than to follow links from strangers or download anything without running it by me.)

Jul 9, 2020 6:25 PM in response to BDAqua

Wifi only. We can try starting up in Safe Mode, but this happens randomly — it could be days, or even weeks before he sees this again. (Hence, why it was a month before I returned to this thread.) It will be hard to determine how long to run in Safe Mode before we think it's not happening because of Safe Mode vs. because it's just not happening.


Shouldn't there be a way to stop the send process? Or a way to find out what message is being sent? Anything we can do in Terminal to spy on the process, for example? Ages ago, Mail had the option of having a floating child window during the send process so you could see what was happening, but that appears to be gone.


I'm going to horse around with the Connection Doctor in the Window menu and see if I can gather more data.



Jul 17, 2020 6:18 PM in response to 100 Watt Walrus

@BDAqua

I've got a Mail.app now, with data during one of these never-finishes-sending sessions. This one was only 1.3MB and still stuck.


I skimmed the log for PII and it doesn't seem like anything in there would be dangerous to share, but you'd know better than I would (I think). If I attached the log here, would that be helpful (and safe)?


EDIT: Forgot I had a screenie to attach.

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Mail never finishes sending?

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