[Users] [Bug 3244] New: Claws-mail fails connection to imap server as "connection refused" (ipv6=unreachable, ipv4=reachable)

[noreply at thewildbeast.co.uk]

http://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=3244

            Bug ID: 3244
           Summary: Claws-mail fails connection to imap server as
                    "connection refused" (ipv6=unreachable,
                    ipv4=reachable)
    Classification: Unclassified
           Product: Claws Mail
           Version: 3.9.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Folders/IMAP
          Assignee: users at lists.claws-mail.org
          Reporter: bonbons67 at internet.lu

When attempting to connect to imap server claws-mail show error message stating
that connection was refused.

stracing claws-mail during such an operation shows:
socket()
connect( ipv6-addr ): NETWORK UNREACHABLE

write(stderr, ... IMAP error on hostname.tld: connection refused ...)


I would expect claws-mail to retry connection to ipv4 address and only if that
one fails too, report either failure cause of connection to ipv6 address or
ipv4 address, but not an invented "connection refused" when it effectively is
"network unreachable". "connection refused" means that either server or a
firewall in between has actively rejected the connection. If there is no
granularity regarding the cause available the error message should rather be
"connection failed" instead of "connection refused".

Should apply to more recent releases as well unless news omitted to report a
fix.

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