I have been making the transition to Ubuntu from my Mac desktop and Windows laptap. I use v3.0.5.3 of ISPConfig, installed with Debian. I was out of the country for a couple of months, and 2 weeks before I came back(3 weeks ago), my dual boot laptop (Windows 7 and Ubuntu 16.x) started having an issue with using Thunderbird. Thunderbird works fine. It loads up. But, all 5 email accounts that I have on my ISPConfig server just stopped working. No incomign mail, and no sending of mail. It stil is not working. Up until I left, my desktop Ubuntu TBird was still working fine. I am heading back in 2 weeks, and I hope that it is still working I got home form my trip 2 weeks ago, and my desktop computer that I have been using during my transition, the Thundrbird stopped working in receiving or sending email with all email accounts on ISPConfig server. 5 days later, incoming mail works, but even after 2 weeks, the outgoing mail does not work. My mac still works. I can add and remove an email, no glitches. Windows, the same thing. It seems to be Ubntu(maybe TBird?) where there is a glitch when working with ISPConfig. Dos anyone have a idea where I can start looking for this ISPConfig/Ubntu/TBird glitch? Thanks for any ideas. Joseph
