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Mailman Error | Internal Server Error

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How to fix Mail Error | Internal Server Error in cPanel 

Are you getting an Internal server error while accessing the mailing list? Mostly it will be displayed the Mailman errors and Mailman Bug after you migrated cPanel accounts to new hosts.

Mailman is software that lets you manage electronic mailing lists. It supports a wide range of mailing list types, such as general discussion lists and announce-only lists. Mailman has extensive features which make it good for list subscribers, such as easy subscription and unsubscription, privacy options, and the ability to temporarily stop getting posts from the list. The list of member features are covered in this document.

Fix cPanel mailman Errors

There is various reason behind these mailman errors.

You will need to check permission and ownership for the mailman installation directory.
# ls -ld /usr/local/cpanel/3rdparty/mailman/

drwxrwsr-x 21 mailman mailman 4096 Nov 30 04:56 /usr/local/cpanel/3rdparty/mailman/

Verify that ownership and permission are set recursively to mailman and drwxrwsr-x respectively.

Changing permission and ownership recursively
# chown mailman.mailman /usr/local/cpanel/3rdparty/mailman/ -R
# chmod 02775 -R /usr/local/cpanel/3rdparty/mailman/

Restart the cPanel service and verify the mailman errors. If you still getting the below error or any other permission errors

“Please inform the webmaster of this site of this problem. Printing of traceback and other system information has been explicitly inhibited, but the webmaster can find this information in the Mailman error logs.”

Use the following command to auto-check all the permission on the mailman.
# /usr/local/cpanel/3rdparty/mailman/bin/check_perms

If your problem still persists then you can use the script provided by cPanel to fix mailman or reinstall mailman.

Make sure you take a backup of the directory mailman before executing the script.

i) Fix mailman:
# /scripts/fixmailman
ii) Reinstall Mailman:
# /scripts/reinstallmailman
Use the /scripts/check_cpanel_rpms script to check the Mailman RPM for issues.

You can also try the following mailman commands.

Commands:

Repair Mailman permissions /usr/local/cpanel/3rdparty/mailman/bin/check_perms -f
Repair Mailman archive permissions and mailing lists. /usr/local/cpanel/scripts/fixmailman
View all lists /usr/local/cpanel/3rdparty/mailman/bin/list_lists
View all list members /usr/local/cpanel/3rdparty/mailman/bin/list_members listname_domain.com

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Cpanel Server Management Plans

Premium Support

24/7 End User Support from your Helpdesk

$ 99 Monthly / Server
  • 24/7 End User White Label Support
  • Unlimited Number of Tickets
  • Chat Support for Admin
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Platinum Support

24/7 Proactive Server Management
$ 49 Monthly / Server
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  • Separate Account Manager
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$ 29 Monthly / Server
  • Unlimited Admin Tasks
  • 24/7 Support
  • Basic Monitoring
  • 30 Minutes Response time
  • 4 hours Response time for possible issues
  • Security and Performance Optimization
  • React to Customers queries
  • No Third party application support
  • No Migration and End User Support