Solved ERROR: NIS lookup not set. NIS lookup disabled it appears in maillog

Description: In this we explained the ERROR: NIS lookup not set. NIS lookup disabled it appears in maillog.

To solve the error you need to follow these steps:

Solution:

Open the file main.cf with your favorite editor, we use vim:

vim /etc/squirrelmail/main.cf

Go to Line number 382

You see the alias_maps = hash:/etc/aliases

Uncomment it by removing the #.

This is all.

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