diff --git a/interface/web/dns/form/dns_soa.tform.php b/interface/web/dns/form/dns_soa.tform.php
index adbd6283a32b474ab358bda6ce8ec2fb08dbd9bf..4b1203ae50410805021f8e1f932428eb827d2c9f 100644
--- a/interface/web/dns/form/dns_soa.tform.php
+++ b/interface/web/dns/form/dns_soa.tform.php
@@ -82,7 +82,7 @@ $form["tabs"]['dns_soa'] = array (
 										1 => array (	'type'	=> 'UNIQUE',
 														'errmsg'=> 'origin_error_unique'),
 										2 => array (	'type'	=> 'REGEX',
-														'regex' => '/^[\w\.\-]{2,64}\.[a-zA-Z]{2,10}[\.]{0,1}$/',
+														'regex' => '/^[\w\.\-]{2,255}\.[a-zA-Z]{2,10}[\.]{0,1}$/',
 														'errmsg'=> 'origin_error_regex'),
 									),
 			'default'	=> '',
diff --git a/interface/web/mail/form/mail_domain.tform.php b/interface/web/mail/form/mail_domain.tform.php
index 4ccd1842def0f39c955586fd0b745da42152aa16..98983c2c15f4bdd29523b48a46b5e2f068305120 100644
--- a/interface/web/mail/form/mail_domain.tform.php
+++ b/interface/web/mail/form/mail_domain.tform.php
@@ -77,7 +77,7 @@ $form["tabs"]['domain'] = array (
 										1 => array (	'type'	=> 'UNIQUE',
 														'errmsg'=> 'domain_error_unique'),
 										2 => array (	'type'	=> 'REGEX',
-														'regex' => '/^[\w\.\-]{2,64}\.[a-zA-Z]{2,10}$/',
+														'regex' => '/^[\w\.\-]{2,255}\.[a-zA-Z]{2,10}$/',
 														'errmsg'=> 'domain_error_regex'),
 									),
 			'default'	=> '',
diff --git a/interface/web/mail/form/mail_domain_catchall.tform.php b/interface/web/mail/form/mail_domain_catchall.tform.php
index 457ebd247af4050879ef31bdd3c270bcabe4b4b6..85c2f96c5643ba7a1dbc691ca5aa13ea9e550174 100644
--- a/interface/web/mail/form/mail_domain_catchall.tform.php
+++ b/interface/web/mail/form/mail_domain_catchall.tform.php
@@ -74,7 +74,7 @@ $form["tabs"]['catchall'] = array (
 										1 => array (	'type'	=> 'UNIQUE',
 														'errmsg'=> 'domain_error_unique'),
 										2 => array (	'type'	=> 'REGEX',
-														'regex' => '/^\@[\w\.\-]{2,64}\.[a-zA-Z]{2,10}$/',
+														'regex' => '/^\@[\w\.\-]{2,255}\.[a-zA-Z]{2,10}$/',
 														'errmsg'=> 'domain_error_regex'),
 									),
 			'default'	=> '',
diff --git a/interface/web/sites/form/web_aliasdomain.tform.php b/interface/web/sites/form/web_aliasdomain.tform.php
index 815a373c35ad2c6837f9ae17449e8108b4f90b90..ef360680a5d23eeee40837ae94d7a04cff2ab5d9 100644
--- a/interface/web/sites/form/web_aliasdomain.tform.php
+++ b/interface/web/sites/form/web_aliasdomain.tform.php
@@ -77,7 +77,7 @@ $form["tabs"]['domain'] = array (
 										1 => array (	'type'	=> 'UNIQUE',
 														'errmsg'=> 'domain_error_unique'),
 										2 => array (	'type'	=> 'REGEX',
-														'regex' => '/^[\w\.\-]{2,64}\.[a-zA-Z]{2,10}$/',
+														'regex' => '/^[\w\.\-]{2,255}\.[a-zA-Z]{2,10}$/',
 														'errmsg'=> 'domain_error_regex'),
 									),
 			'default'	=> '',
diff --git a/interface/web/sites/form/web_domain.tform.php b/interface/web/sites/form/web_domain.tform.php
index b1da5931ea441fdb925ab5253e5d10b6ba5d85e8..882a784ee78e9f6e85544cebcc83429b596eefa4 100644
--- a/interface/web/sites/form/web_domain.tform.php
+++ b/interface/web/sites/form/web_domain.tform.php
@@ -97,7 +97,7 @@ $form["tabs"]['domain'] = array (
 										1 => array (	'type'	=> 'UNIQUE',
 														'errmsg'=> 'domain_error_unique'),
 										2 => array (	'type'	=> 'REGEX',
-														'regex' => '/^[\w\.\-]{2,64}\.[a-zA-Z]{2,10}$/',
+														'regex' => '/^[\w\.\-]{2,255}\.[a-zA-Z]{2,10}$/',
 														'errmsg'=> 'domain_error_regex'),
 									),
 			'default'	=> '',
diff --git a/interface/web/sites/form/web_subdomain.tform.php b/interface/web/sites/form/web_subdomain.tform.php
index cc209ff41e37629b4cefef723b8f3991035c3a38..f6cc6f8bf57f17e4ba8357cd254eef76b706855b 100644
--- a/interface/web/sites/form/web_subdomain.tform.php
+++ b/interface/web/sites/form/web_subdomain.tform.php
@@ -77,7 +77,7 @@ $form["tabs"]['domain'] = array (
 										1 => array (	'type'	=> 'UNIQUE',
 														'errmsg'=> 'domain_error_unique'),
 										2 => array (	'type'	=> 'REGEX',
-														'regex' => '/^[\w\.\-]{2,64}\.[a-zA-Z]{2,10}$/',
+														'regex' => '/^[\w\.\-]{2,255}\.[a-zA-Z]{2,10}$/',
 														'errmsg'=> 'domain_error_regex'),
 									),
 			'default'	=> '',