5 days ago I installed Carbonio CE 26.3.0 on a clean Ubuntu 22. Everything started up, all services are running. Email, chats, and video work without issues on PC and Android. However, there is a problem with launching the Carbonio Chats app on iOS (updated to the latest version 26.5). It connects to the server, Carbonio Mail works without problems, but Carbonio Chats gets stuck on the 'Login' screen after entering account credentials.
Additional information from the logs: 2026-06-01 21:16:12,582 INFO [qtp1457899771-7219] [name=user@domen.com;ip=192.168.x.x;oip=y.y.y.y, 192.168.z.z;oproto=https;port=47722;soapId=5e531c56;] account - Authentication successful for user: user@domen.com
2026-06-01 21:16:12,582 INFO [qtp1457899771-7219] [name=user@domen.com;ip=192.168.x.x;oip=y.y.y.y, 192.168.z.z;oproto=https;port=47722;soapId=5e531c56;] soap - AuthRequest elapsed=13
2026-06-01 21:16:12,593 INFO [qtp1457899771-7217] [name=user@domen.com;mid=7;ip=192.168.x.x;oip=y.y.y.y, 192.168.z.z;oproto=https;port=47724;soapId=5e531c57;] soap - GetInfoRequest elapsed=1
2026-06-01 21:16:23,427 INFO [qtp1457899771-7216] [name=user@domen.com;mid=7;ip=192.168.x.x;oip=y.y.y.y, 192.168.z.z;port=39018;ua=CarbonioWebClient - Chrome 148.0.0.0 (Windows) removed link carbonio 202603 FOSS;soapId=5e531c58;] soap - NoOpRequest elapsed=0
These are the logs from the host where it shows error 502: y.y.y.y - - [02/Jun/2026:01:05:27 +0300] ＂GET /zx/auth/supported HTTP/2.0＂ 502 1092 ＂-＂ ＂Carbonio Chats - v1.3.0 - iOS 26.5 - iPhone 12 Pro Max＂ y.y.y.y- - [02/Jun/2026:01:05:27 +0300] ＂POST /service/soap/AuthRequest HTTP/2.0＂ 200 316 ＂-＂ ＂Carbonio Chats - v1.3.0 - iOS 26.5 - iPhone 12 Pro Max＂ y.y.y.y- - [02/Jun/2026:01:05:27 +0300] ＂POST /service/soap/GetInfoRequest HTTP/2.0＂ 200 5310 ＂-＂ ＂Carbonio Chats - v1.3.0 - iOS 26.5 - iPhone 12 Pro Max＂ y.y.y.y- - [02/Jun/2026:01:09:17 +0300] ＂GET /services/chats/events HTTP/1.1＂ 101 882 ＂-＂ ＂-＂
We recently upgraded to CE 26, and not only do chats no longer work, but also it is no longer accepting any connections on ports 587 or 465 -- so as a result outlook will not connect either (for outgoing mail).