My POP3/IMAP server is refusing my connection attempts

The standard server ports used for POP3 and IMAP connection are port 110 and port 143 respectively. If you receive a notification for refused connection by the POP3 or IMAP server we would advise you to check the connection from your computer to the appropriate port.

 How to run the port 110 check for POP3 issues and the port 143 check for IMAP issues

 1. Check port 110 or 143 with a Windows OS

You should click on the Start menu button, usually located on the left low corner of the screen. There is a tab called "Run". You have to click on it, in order to proceed further. You will notice the appearance of a new small window on the screen. In the text field of this window you need to type "cmd" and then press the "Enter" key. Another window will open. It is the so called "MS-DOS prompt" or "command prompt". Just type the following command in the command prompt window:

for POP3:                                                 telnet 110

for IMAP:                                                   telnet 143 

2. Check port 110 or 143 with Apple/Mac

Each Mac OS is delivered with a preinstalled terminal emulator. The terminal is a tool which allows you to execute commands from the command line. Usually, the terminal is located under your Mac HD -> "Applications" directory -> Utilities sub-directory. When the window opens, you will see a command line with a flashing cursor on it so you can start typing right away. Just type the following command:

for POP3 :                                                 telnet 110

for IMAP:                                                    telnet 143 

3. Check port 110 or 143 with Linux

Please open your favorite terminal emulator and execute the following command in order to telnet your website:

for POP3 :                                                 telnet 110

for IMAP:                                                    telnet 143 

Results from the port check

If the test is successful, you should receive one of the following mesages:

for the port 110 POP3 test

+OK Hello there.

for the port 143 IMAP test


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  1. Reply June 17, 2015 / 17:09 MiloSiteGround Team

    send/receive status up to 80%- but not downloading any
    messages . Reported error (0x80042108)- outlook unable to connect
    to incoming (POP3) email server

    • Reply June 18, 2015 / 08:04 Marina YordanovaSiteGround Team

      Hello Milo, it would be best to contact your web host directly to ask them to review the issue. If you are a SiteGround customer, please post a ticket to our Support team from the HelpDesk so they can investigate further. Regards!

    • Reply June 18, 2015 / 08:55 Hristo PandjarovSiteGround Team

      That seems like a connectivity issue. Please contact our technical support for additional assistance.

  2. Reply June 23, 2015 / 14:01 sachinSiteGround Team

    Sachins-MacBook-Pro:~ sachin$ telnet 993
    Connected to
    Escape character is '^]'.
    Connection closed by foreign host.
    Sachins-MacBook-Pro:~ sachin$

    can't connect what can be the issue

    • Reply June 25, 2015 / 09:31 Hristo PandjarovSiteGround Team

      Please, open a ticket in your Help Desk. Our support team will happily assist you.

  3. Reply December 1, 2015 / 04:30 AmandaSiteGround Team

    I'm not receiving my e-mails been going on for at least 4hrs I've even tried e-mailing myself it declined. I've tested for malware via a down load from micro soft. Don't know what to do baffled, as to what is wrong

    • Reply December 1, 2015 / 14:31 Hristo PandjarovSiteGround Team

      Please, post a ticket in your Help Desk. My colleagues will happily revise your case and assist you.

  4. Reply December 21, 2015 / 15:13 Craig HaleySiteGround Team

    My incoming mail sever password changed by its self because I keep getting an error message that says, " Can't receive mail, user name or password is incorrect". Now I don't know what the password is because every password that I think it might be does not work. How do I correct this?

    • Reply December 22, 2015 / 15:18 Kiril HristovSiteGround Team

      Here is a tutorial on how to change your email password:

      If that does not solve the issue, please post a ticket in your help desk and we will assist you.

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