Hello,
I'm trying to verify that my regex looks good, in theory, it should be fine, but I'm seeing this in the logs:
Apr 13 18:18:11 smtp postfix/smtpd[1039]: warning: regexp map /etc/postfix/senderaccess, line 1: Invalid preceding regular expression
Apr 13 18:18:11 smtp postfix/smtpd[1039]...