I'm getting problem after CWP mail server migration from existing server to new server. It's showing Connection to storage server failed , General Troubleshooting Tips Run “postfix check” to make Postfix look for obvious configuration errors. If it returns no output then no problem was found. Read your /var/log/dovecot.log & /var/log/mail.log and look for warnings and errors. I'm getting the following information from /var/log/dovecot.log I get “Permission denied” from Dovecot in the mail.log file. You have the permissions wrong. Run the following command # chown -R vmail:mail /var/vmail Finally all user's of that domain can login successfully . This post is based on this article. Link 1 Link 2
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