Problem with moderate package

I all, last week I began to move one list to another server (from SUSE 6.4
to Redhat 7.2).

Smartlist works good as usual, but the moderate package doesn't work, please
what's wrong ?

This is the error when I try to send a mail to the list:

  ----- The following addresses had permanent fatal errors -----
"|mod-if ifmlist"
    (reason: 255)
    (expanded from: [email protected])

   ----- Transcript of session follows -----
syntax error at /etc/smrsh/mod-if line 193, near "my "
Global symbol "$domain" requires explicit package name at /etc/smrsh/mod-if
line 193.
Global symbol "$domain" requires explicit package name at /etc/smrsh/mod-if
line 340.
Global symbol "$domain" requires explicit package name at /etc/smrsh/mod-if
line 341.
Global symbol "$domain" requires explicit package name at /etc/smrsh/mod-if
line 362.
Global symbol "$domain" requires explicit package name at /etc/smrsh/mod-if
line 376.
Global symbol "$domain" requires explicit package name at /etc/smrsh/mod-if
line 394.
Global symbol "$domain" requires explicit package name at /etc/smrsh/mod-if
line 398.
Execution of /etc/smrsh/mod-if aborted due to compilation errors.
554 5.3.0 unknown mailer error 255


Line 193 is:
my $domain         = "my-domain.com";

Any good idea ?

Thanks in advance
Giorgio