Fix minor typo

interface/web/mail/lib/lang/ar_mail_domain_catchall.lng

@@ -4,7 +4,7 @@ $wb['destination_txt'] = 'Destination';
 $wb['active_txt'] = 'Active';
 $wb['domain_error_unique'] = 'There is already a Catchall record for this domain.';
 $wb['no_domain_perm'] = 'You have no permission for this domain.';
-$wb['domain_error_regex'] = 'Invalid domain name od domain contains invalid characters.';
+$wb['domain_error_regex'] = 'Invalid domain name or domain contains invalid characters.';
 $wb['limit_mailcatchall_txt'] = 'The max. number of email catchall accounts for your account is reached.';
 $wb['source_txt'] = 'Source';
 $wb['destination_error_isemail'] = 'Destination is no valid email address.';

interface/web/mail/lib/lang/en_mail_domain_catchall.lng

@@ -4,7 +4,7 @@ $wb["destination_txt"] = 'Destination Email';
 $wb["active_txt"] = 'Active';
 $wb["domain_error_unique"] = "There is already a Catchall record for this domain.";
 $wb["no_domain_perm"] = "You have no permission for this domain.";
-$wb["domain_error_regex"] = 'Invalid domain name od domain contains invalid characters.';
+$wb["domain_error_regex"] = 'Invalid domain name or domain contains invalid characters.';
 $wb["limit_mailcatchall_txt"] = 'The max. number of email catchall accounts for your account is reached.';
 $wb['domain_txt'] = 'Domain';
 $wb["source_txt"] = 'Source';