Maximum number of connections from user+IP exceeded

Posted on June 10th, 2019

 

If you are getting an error like ‘ Error – Maximum number of connections from user+IP exceeded through POP3 login’ while connecting the mail service via email client using POP3 connection, then you would need to increase the Maximum number of POP3 connections allowed for a user from each IP address on your server.

To increase the Maximum number of POP3 connections, please follow the steps provided in this article:

1) Login to your WHM server and then navigate to “Service Configuration”.

POP3 Error

 

2) Click on “Mailserver Configuration” to edit this.

POP3 Error

 

3) From Mailserver Configuration, you can increase the maximum number of POP3 connections on the server. This interface allows you to configure the POP3 and IMAP protocols that the Dovecot® mail servers use. You can access these options when you run the Dovecot mail server. Search for the variable ‘Maximum POP3 Connections per IP Address’ and increase the value to 10.

Maximum number

 

 

4) After enabling this change, you would need to save the file by clicking ‘Save Changes’ button to reflect the changes you were made.

POP3 Error

 

You can also try to edit the configuration via CLI.

1) login to the server as the root user via SSH command.

2) Navigate to /etc/dovecot folder.

3) Open dovecot.conf file using your favorite editor.

# vi dovecot.conf

4) Locate “mail_max_userip_connections” on that configuration file and increase the value to 10, the maximum number of POP3 connections allowed for a user from each IP address.

mail_max_userip_connections = 10

5) Now save the file and restart Exim using the below command.

#service exim restart

 

If you need any further help, please do reach our support department.

 

3 Responses to “Maximum number of connections from user+IP exceeded”

  1. Al Emran Islam says:
    November 6, 2022 at 12:38 pm

    Hello Sir, I am working for develop an email application using Angular, Node.js and imap-simple. Our tester getting this error sometimes but I have increased the connections(mail_max_userip_connections=600) but still now getting this error.

    Do you have any permanent solution for this issues?

    Thanks and Regird
    Al Emran

    Reply
  2. Prosper says:
    September 15, 2023 at 2:25 pm

    I want to exist the maximum number of IP

    Reply

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