Hello, this problem seems to be well known (more or less). We have these complaints from time to time ("cannot save to Sent folder"). I think there were no problems when we used UW-IMAP (but I'm not sure).
It is not specific to dovecot-beta3. It happened with all dovecot versions, all Thunderbird versions and all OS. AFAIK it is a client problem (Thunderbird).
I found some entries in a Mozilla/Thunderbird forum (I'll try to find the URL, if someone wants it). It seems that this problem exists since at least 2 years within the source code. But since only a few people are having this problem and the developers can't reprocude it, they can't fix it.
If I remember correctly, there were also people reporting the problem with UW-IMAP.
Martin
Peterg wrote:
... The problem(s) I am encountered have been reported here a few times previously over the last couple of years but in searching I have not found any concrete solutions. When I first tested it out there was a continuous problem of a failure in saving a copy of an email to the sent folder although the message was sent. One of the staff of the mailhosting company noted this exact problem as well and believed the issue was Dovecot announcing different IMAP capabilities than the real backend IMAP servers (via the CAPABILITY command). This was supposedly fixed and initially there were no issues with the first set of test emails. However, in short order, this problem re-emerged and there would be sporadic failures to copy a message to the sent folder. Another issue would be that every now and then, when clicking on a folder in the left-hand pane (and no other activity going on with Thunderbird like downloading a new mail) Thunderbird would hourglass for 10-15 seconds as if it were trying to open a connection and was having difficulty. The maximum number of connections setup in Thunderbird is the default 5 and I am advised that this is the correct setting with their servers. Reducing the maximum number of connections does not appear to change matters in terms of avoiding these problems.
Changing back to the current system (ie not using the test proxy server) both these issues disappeared. I have been in communication with the mailhosting provider as to my findings but it would be most appreciated if others here would perhaps have some insight into this matter.
Martin Preen, Universitaet Freiburg, Institut fuer Informatik Georges-Koehler-Allee 52, Raum 00-006, 79110 Freiburg, Germany
phone: ++49 761 203-8250 preen@informatik.uni-freiburg.de fax: ++49 761 203-8242 www.informatik.uni-freiburg.de