diff --git a/lib/functions/dns/function.createDomainZone.php b/lib/functions/dns/function.createDomainZone.php
index 7bff185e..9d94f207 100644
--- a/lib/functions/dns/function.createDomainZone.php
+++ b/lib/functions/dns/function.createDomainZone.php
@@ -232,7 +232,7 @@ function createDomainZone($domain_id, $froxlorhostname = false, $isMainButSubTo
 			if (Settings::Get('dkim.use_dkim') == '1') {
 				$dkim_entries = generateDkimEntries($domain);
 			}
-			if ($domain['isemaildomain'] === '1') {
+			if ($domain['isemaildomain'] == '1') {
 			    #DKIM AND DMARC
 			    $zonerecords[] = new DnsEntry('mx._domainkey', 'TXT', '("v=DKIM1; k=rsa;"
 				"p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyk6+Y5RkqqGeTxWmULWE"