this post was submitted on 11 Sep 2025
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Nextcloud (Docker) calendar sent email reminders for a few days, then stopped. Cron job is working, test emails also work (lemmy.world)
submitted 1 month ago* (last edited 1 month ago) by chriscrutch@lemmy.world to c/selfhosted@lemmy.world
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Hello all, first time with Nextcloud and I must be missing something here. I have Nextcloud running in a docker container and hosting my calendar. I set it up for email reminders for events. The test email sends fine. I got a cron job set up on the host and the notifications worked for a few days, then stopped. The test email still sends just fine. So I look in the admin panel and see that the emails stopped when the background jobs stopped, which for some reason was a few days ago. No idea why, because the cron job was still firing and not giving any errors, but whatever.

So I fixed some stuff and got a host cron job running for the background tasks. Now that part is working again every five minutes as expected, but the email notifications for calendar events did not start sending again. The test email still sends just fine.

What am I missing here?

Edit: well I have no idea what the problem was, I didn't solve it. I deleted the docker container and started from scratch. Fortunately it wasn't that much of a pain because I hadn't been using it for very long. With the first installation I found a few things not to do in the second, and so far the re-install is working beautifully. Lots of things to tweak now.

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[–] sj_zero@lotide.fbxl.net 6 points 1 month ago

Since calendar is an app, but fundamental email service isn't, one thing that I found is that apps can interact in ways that are completely unintuitive.

For example, I activated the ncdownloader app, and it caused mail to stop showing emails, or I activated nextcloud music and it stopped nextcloud news from updating.

You should check your logs, because usually when there's a problem it will show up in there. The logs I'm referring to are in your administrator panel. It will be completely unintuitive as to what exactly is going on. The other thing that you can do is just pay attention to which apps you've installed, and if there are any that are a little bit unusual, just try to disabling them and seeing if calendar mail works after that.