[Mailman-Users] Fw: Returned mail: unknown mailer error 2

[Kasopa Wilbroad Chisanga]

Hello,

Please help me on what mailer I am supposed to use in the aliases file. I
have tried several things but to no avail.
Please see below and advise on the error I am getting.
>
>    ----- Transcript of session follows -----
> Failure to exec script. WANTED gid 1, GOT gid 5.  (Reconfigure to take 5?)
> 554 "|/home/mailman/mail/wrapper mailcmd Mailman"... unknown mailer error
2
>

Kind regards,

Wilbroad.