Another update if anyone is interested. Now the sent folder opens normally but when I click on a particualar message with 1 MB PDF attachment Thunderbird timesout again :-(

Looks like I could identify the cause: In both accounts there were two big attachments that cause the timeout. One is a 38 MB MOV Video the other is a 93 MB PDF. I noticed that Thunderbird could load all message headers up to these two and then caused a timeout each time. So I looked at the next messages and noticed the bigger size. As soon as I moved these big emails to another folder the sent folders in both accounts now load without problems. But now the new folders containing those attachments...

Hi, We use DavMail with two Hosted Exchange 2013 accounts at Domainfactory (df.eu) with IMAP on Thunderbird. Everything worked fine until yesterday but now the "Sent" folder gets disconnected on both accounts every time . E.g. on one account TB has downloaded 2475 of 2493 messages (615 MB) in Sent and now every time I click on the Sent folder the disconnection happens. The davmail log says something like: 2019-04-08 16:10:55,238 INFO [ImapConnection-57379] davmail.connection - LOGON - 0:0:0:0:0:0:0:1:57379...

Hi, We use DavMail with two Hosted Exchange 2013 accounts at Domainfactory (df.eu) with IMAP on Thunderbird. Everything worked fine until yesterday but now the "Sent" folder gets disconnected on both accounts every time . E.g. on one account TB has downloaded 2475 of 2493 messages (615 MB) in Sent and now every time I click on the Sent folder the disconnection happens. The davmail log says something like: 2019-04-08 16:10:55,238 INFO [ImapConnection-57379] davmail.connection - LOGON - 0:0:0:0:0:0:0:1:57379...

Hi! First of all - thanks for this great software! I installed Davmail in order to convert an IMAP account to exchange without losing the IMAP tags. Because I use a German Thunderbird I had to remap the label names in .davmail.properties as described at the bottom of this page: http://davmail.sourceforge.net/thunderbirdimapmailsetup.html So "Important" becomes "Wichtig" in German like this: davmail.imapFlags.$label1=Wichtig Now when I copy a mail from my IMAP account into the Davmail (Exchange 2013)...