Occasionally Odin Plesk customers report inability to send or receive emails reporting the following Outlook errors:
The host 'mail.domain.com' could not be found. Please verify that you have entered the server name correctly. Account: 'username', Server: 'mail.domain.com', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 11001, Error Number: 0x800CCC0D.
Now almost every webmaster uses a mobile device to check and reply to their business mails, but the increased mobility presents an issue of mails going out of sync between the various devices they use.
Engineers in our help desk support team often receive requests to locate missing mails sent from mobile devices. This is mostly reported by iPhone and iPad users, and is caused by differing naming conventions for the “sent” mail folder in different mail clients.
cPanel logs provide a goldmine of information to quickly resolve various customer issues and server errors.
Here’s a list of the cPanel logs most commonly used by our expert server administrators, and the commonly sought information in them.
POP and IMAP are two protocols that mail programs use to access mail stored on remote computers. The first thing you have to do is to understand what is POP and IMAP and also the difference between the two. These protocols are supported by most existing mail servers.
POP ( Post Office Protocol )
POP downloads all your emails from the mail server in a one-time pop. Once you have checked your messages via POP, those messages no longer live on the server. There are chances for messages in the server get deleted after it is downloaded from the server. Since POP3 creates local copies of emails and deletes the originals from the server, the emails are tied to that specific machine, and cannot be accessed via any webmail or any separate client on other computers. We can say that POP uses a one way ticketing system.
One of our customers requested for a pop server connection and I started searching for a pop server which is capable of working with sendmail already running in his server. He had a server without control panel, with Red Hat Linux release 9 (Shrike). The research ended up with the term Dovecot.
This article describes how to install the Dovecot mail server from source as an imap / pop3 mail server, and how to set up the sieve plugin so that the customers can use the sieve mail filtering language for their mail accounts.
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