diff --git a/bind8/lang/en b/bind8/lang/en
index de9238e19..170f7105a 100644
--- a/bind8/lang/en
+++ b/bind8/lang/en
@@ -276,6 +276,7 @@ edit_dok=Yes, Delete It
 edit_eptr='$1' is not a valid reverse address record hostname
 edit_espfa='$1' is not a valid host to allow sending from
 edit_espfmx='$1' is not a valid domain name to allow MX sending from
+edit_espfmxmax=You are not allowed to have more than 10 domains to allow MX sending from
 edit_espfip='$1' is not a valid IP address or IP/prefix to allow sending from
 edit_espfip6='$1' is not a valid IPv6 address or IPv6/prefix to allow sending from
 edit_espfinclude='$1' is not a valid additional domain from which mail is sent
diff --git a/bind8/save_record.cgi b/bind8/save_record.cgi
index d1c17e7ff..65bcf50aa 100755
--- a/bind8/save_record.cgi
+++ b/bind8/save_record.cgi
@@ -294,6 +294,8 @@ else {
 		foreach my $mx (@{$spf->{'mx:'}}) {
 			&valname($mx) || &error(&text('edit_espfmx', $mx));
 			}
+		@{$spf->{'mx:'}} <= 10 ||
+			&error(&text('edit_espfmxmax', 10));
 		$spf->{'ip4:'} = [ split(/\s+/, $in{'spfip4s'}) ];
 		foreach my $ip (@{$spf->{'ip4:'}}) {
 			&check_ipaddress($ip) ||