I’m seeing something odd where some messages are not being delivered until very late, only for icloud.
We get the Reception webhook but no deferrals, but according to Grafana there are some. When checking the provider-summary I see 3 transient failures and one open connection.
Restarting the kumomta pod immediately sends and delivers the message.
Looking up the logs, there’s nothing that I can find that’s related, just some messages that are actually delivered having Ok: queued as xxxxx in the response as expected.
Every other provider is correctly sending deferrals to our webhooks, including Postmastery.
This happened to us twice this week now while we haven’t noticed these issues before.
I also did not see any suspsensions of a (ready-)queue