diff --git a/EVENTS.txt b/EVENTS.txt
index 6ac607382b..aca9e8f73d 100644
--- a/EVENTS.txt
+++ b/EVENTS.txt
@@ -1342,3 +1342,12 @@ EndAddEmailAddress: done adding an email address through the Web UI
 - $user: user getting the new address
 - $email: email being added
 
+StartValidateEmailInvite: when validating an email address for invitations
+- $user: user doing the invite
+- $email: email address
+- &$valid: flag for if it's valid; can be modified
+
+EndValidateEmailInvite: after validating an email address for invitations
+- $user: user doing the invite
+- $email: email address
+- &$valid: flag for if it's valid; can be modified
diff --git a/actions/invite.php b/actions/invite.php
index 7a1f8b3f5b..be2228e703 100644
--- a/actions/invite.php
+++ b/actions/invite.php
@@ -73,7 +73,14 @@ class InviteAction extends CurrentUserDesignAction
 
         foreach ($addresses as $email) {
             $email = trim($email);
-            if (!Validate::email($email, common_config('email', 'check_domain'))) {
+            $valid = null;
+
+            if (Event::handle('StartValidateEmailInvite', array($user, $email, &$valid))) {
+                $valid = Validate::email($email, common_config('email', 'check_domain'));
+                Event::handle('EndValidateEmailInvite', array($user, $email, &$valid));
+            }
+
+            if (!$valid) {
                 // TRANS: Form validation message when providing an e-mail address that does not validate.
                 // TRANS: %s is an invalid e-mail address.
                 $this->showForm(sprintf(_('Invalid email address: %s.'), $email));