dns_update: assume DKIM is present

management/dns_update.py

@@ -195,7 +195,7 @@ def build_zone(domain, all_domains, additional_records, env, is_zone=True):
 		if has_rec(qname, rtype): continue
 		records.append((qname, rtype, value, "(Set by user.)"))
 
-	# Add defaults if not overridden by the user's custom settings.
+	# Add defaults if not overridden by the user's custom settings (and not otherwise configured).
 	defaults = [
 		(None,  "A",    env["PUBLIC_IP"],       "Required. May have a different value. Sets the IP address that %s resolves to for web hosting and other services besides mail. The A record must be present but its value does not affect mail delivery." % domain),
 		("www", "A",    env["PUBLIC_IP"],       "Optional. Sets the IP address that www.%s resolves to, e.g. for web hosting." % domain),
@@ -208,10 +208,8 @@ def build_zone(domain, all_domains, additional_records, env, is_zone=True):
 		if not has_rec(qname, rtype):
 			records.append((qname, rtype, value, explanation))
 
-	# If OpenDKIM is in use..
+	# Append the DKIM TXT record to the zone as generated by OpenDKIM.
 	opendkim_record_file = os.path.join(env['STORAGE_ROOT'], 'mail/dkim/mail.txt')
-	if os.path.exists(opendkim_record_file):
-		# Append the DKIM TXT record to the zone as generated by OpenDKIM, after string formatting above.
 	with open(opendkim_record_file) as orf:
 		m = re.match(r'(\S+)\s+IN\s+TXT\s+\( "([^"]+)"\s+"([^"]+)"\s*\)', orf.read(), re.S)
 		val = m.group(2) + m.group(3)