base/postfix: convert sender map to a regex so we can reject emails with two @'s in From.

Signed-off-by: Kevin Fenzi <kevin@scrye.com>

roles/base/files/postfix/main.cf/main.cf.mailman

@@ -696,5 +696,5 @@ local_recipient_maps = hash:/var/lib/mailman3/data/postfix_lmtp
 relay_domains = hash:/var/lib/mailman3/data/postfix_domains
 
 smtpd_sender_restrictions =
-	check_sender_access hash:/etc/postfix/sender_access
+	check_sender_access regex:/etc/postfix/sender_access
 	permit

roles/base/files/postfix/main.cf/main.cf.smtp-mm

@@ -739,4 +739,4 @@ smtp_tls_key_file = /etc/pki/tls/private/gateway.key
 smtp_tls_CAfile  = /etc/pki/tls/certs/ca-bundle.crt
 
 # Deny email from some domains
-smtpd_sender_restrictions = hash:/etc/postfix/sender_access
+smtpd_sender_restrictions = regex:/etc/postfix/sender_access

roles/base/tasks/postfix.yml

@@ -39,7 +39,7 @@
   - base
 
 - name: Create sender_access hash
-  command: postmap hash:/etc/postfix/sender_access
+  command: postmap regexp:/etc/postfix/sender_access
   changed_when: false
   when: postfix_group == "smtp-mm" or postfix_group == "mailman"
   tags: