Hello,

with the release of iOS 26, I had a look again at the infamous issue regarding Apple‘s Mail.app with Dovecot, when folder content does not reliably sync or mail content is not fully loaded. Some made a workaround by disabling pipelining (I didn‘t), and some pointed out Stalwart implemented some changes to work around the issue. A year ago, this was also prominently featured at Heise at least.

I am not sure this is still a recent issue, but I wanted to share my findings.

I have two different mail accounts on two different servers which have also different configurations.

At least with iOS 26 I discovered that once the secondary mail account is added, both accounts suffer from the same problem again.

The mere fact that I have two accounts is not the issue, because the secondary account also doesn’t work when the primary is disabled, but the other way round things have been working fine for at least a few days now.

I assume that hiccups on one account affect both somehow. I did not yet get to compare the system configuration as to why the secondary account has hiccups, but maybe it helps those who debug the issue to reproduce it.

Florian