Hi!
I upgraded Courier IMAP from v. 4.18.2 to 5.0.2, with maildirmake
--checkutf8 <maildir> foreach users' maildir OK, then maildirmake
--convutf8 ... OK, while mail services (postfix, courier-imap-ssl,
courier-imap, courier-pop3-ssl, courier-pop3) where stopped. Now I get
multiple claims from our pop3 clients that they fail to retrieve
messages, e.g. Mozilla Thunderbird shows the following:
Command RETR failed. Error getting message. Mail server «pop.bsuir.by»
replied /(That was my translation from Russian of the Thunderbird
message, - E.S.)/: Cannot open message 1 /(or another number, - E.S.)/
because it is a Unicode message and your E-mail reader did not enable
Unicode support. Please use an E-mail reader that supports POP3 with
UTF-8 (see https://tools.ietf.org/html/rfc6856.html)
One can download the maildir containing only one message that leads to
the error, from https://yadi.sk/d/oQEZZ_0LqPsFxQ . I believe there is
nothing wrong with the message, and I am sure there is nothing wrong
with Thunderbird (latest version BTW), for if I send the message into
trash and then bring it back to inbox, by means of an imap client, the
pop3 client retrieves the message ok.
I "repaired" the inbox of a user that above mentioned way: by means of
an imap client (roundcube webmail) deleted all his mails from inbox,
then brought them back to inbox, but in a couple of days the user gets
another message that disables again his pop3 client because of "Command
RETR failed" error.
Another bad thing that occured while corier-imap upgrade 4.18.2 ->
5.0.2: All (!) our pop3 clients retrieved the copies of messages that
were at the server (many of them failed to retrieve all their messages,
because of the above mentioned "Command RETR failed" error).
We use Courier-imap 5.0.2, Courier-unicode 2.1, maildrop 3.0.0,
Courier-authlib 0.69.0 at openSUSE Linux 15.0.
--
/Regards,/
/Eugene Suprun.
/
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