I solved it. The white space in front of the arguments had been removed so it was reading them as an instruction that it could not understand. Replacing the white space solved the issue thank you.
Geoff +44 20 7100 1092 +44 7770 58 48 38 +33 5 46 97 13 89 +33 6 22 93 00 53 > On 17 May 2020, at 22:56, Wietse Venema <wie...@porcupine.org> wrote: > > Geoff Jankowski: >> May 17 23:15:45 xerxes ifup[5524]: postconf: warning: >> /etc/postfix/master.cf: undefined parameter: mua_sender_restrictions > > Something (Postfix master.cf or main.cf) is using $mua_sender_restrictions, > but that parameter is not defined in main.cf or master.cf. > > In master.cf: > $ postconf -P | grep mua_sender_restrictions > > In main.cf: > $ postconf -n | grep mua_sender_restrictions > > Wietse
