I want to edit M4 File of Sendmail for allowing Undisclosed recipents. Kindly guide the sequence. My current configuration on Sendmail is as follows :
dnl Reject messages that use unqualified names in the From/To header lines
HFrom: $>LocalCheckUnqualifiedAddr
HTo: $>LocalCheckUnqualifiedAddr
SLocalCheckUnqualifiedAddr
R$* % $* $#error $: 553 percent hack not allowed.
R$* undisclosed-recipients:; $* $@ OK
R$* : $* $#error $: 553 source routing not allowed.
R$+ @ $+ $@ OK
R$* postmaster $* $@ OK
R$* `MAILER-DAEMON' $* $@ OK
R$* Undisclosed $* $@ OK
R$* Admin $* $@ OK
R$+ $#error $: 553 Unqualified address: $1
LOCAL_RULE_3
dnl Reject messages that use source routed addresses
R$* % $* $#error $@ 5.1.2 $: "553 percent hack not allowed."
R$* :include: $* $@ OK
R$* undisclosed-recipients:; $* $@ OK
R$* : $* $#error $@ 5.1.2 $: "553 source routing not allowed."