Good day everyone, I am stuck with a quite unusual issue.
On backend side I have most recent SOGo interfacing postfix/dovecot. All running on CentOS7. All set up is tuned to run well without any error messages. SOGo UI works well. Android devices sync mail, contacts. Calendars via ActiveSync without any problem (using BlackBerry sute). iPhone SE with iOS 16 sync mail, contacts calendars via ActiveSync with no issues at all. Everything works as charm. Several MacBooks sync Mail via IMAP (bypassing SOGo) and sync Contacts/Calendars from SOGo via CardDAV/CalDAV - everything works as charm. iPhone 16 with iOS 26.2 and another iPhone with same iOS (cant remember model) manifest all sorts of weird behavior working with Mail via ActiveSync. Mail is not synced, when I refresh in Mail, all mail disappears, then a month worth of mails starting to appear from old dates. And after a week (I have quite some email on daily basis) it stops. Sometimes it sync to more recent, sometime it doesn’t. When you refersh, sometimes it fetches more recent emails, but most of time all email disappears at it seems to try fetching it from scratch. The same iPhone works well with the same mail account if synced via IMAP (bypassing SOGo). I would just drop it but it has unfortunate downside of non operational push, so to see new emails I often have to manually refresh Mail app. Checked logs, enabled debug mode - nothing critical in logs spotted during iPhone sync. Re-connected the same account via activesync several times, used another account to integrate (same behaviour). Please help with any idea where to dig further. Mark
