I have a problem on my windows server running hMailServer 5.3 and Roundcube webmail. The problem is that I can login to IMAP server using outlook from my PC but webmail which is running from the same server as mail server is running on, cannot access the IMAP. When username a(email address) and password is entered, it hangs on for a minute and returns to login page without any error or warnning.
Please help me to diagnose this issue.
Thanks in advance.
If this is happening on mailboxes with very few messages, then it is probably a configuration problem in RoundCube. But if the mailbox has thousands of messages, then it is probably a timeout problem in PHP. On large mailboxes with lots of messages, just use Outlook or Thunderbird instead of IMAP.