diff --git a/src/synapse_registration/registration/signals.py b/src/synapse_registration/registration/signals.py
index 35ef56f..809a602 100644
--- a/src/synapse_registration/registration/signals.py
+++ b/src/synapse_registration/registration/signals.py
@@ -7,6 +7,8 @@ from .models import UserRegistration
 
 import requests
 
+from smtplib import SMTPRecipientsRefused
+
 
 @receiver(post_save, sender=UserRegistration)
 def handle_status_change(sender, instance, created, **kwargs):
@@ -35,21 +37,17 @@ def handle_status_change(sender, instance, created, **kwargs):
                     headers={"Authorization": f"Bearer {settings.SYNAPSE_ADMIN_TOKEN}"},
                 )
 
-            send_mail(
-                "Registration Approved",
-                f"Congratulations, {instance.username}! Your registration at {settings.MATRIX_DOMAIN} has been approved.",
-                settings.DEFAULT_FROM_EMAIL,
-                [instance.email],
-            )
+            try:
+                send_mail(
+                    "Registration Approved",
+                    f"Congratulations, {instance.username}! Your registration at {settings.MATRIX_DOMAIN} has been approved.",
+                    settings.DEFAULT_FROM_EMAIL,
+                    [instance.email],
+                )
+            except SMTPRecipientsRefused:
+                pass
 
         elif status == UserRegistration.STATUS_DENIED:
-            send_mail(
-                "Registration Denied",
-                f"Sorry, your registration request at {settings.MATRIX_DOMAIN} has been denied.",
-                settings.DEFAULT_FROM_EMAIL,
-                [instance.email],
-            )
-
             response = requests.put(
                 f"{settings.SYNAPSE_SERVER}/_synapse/admin/v2/users/@{instance.username}:{settings.MATRIX_DOMAIN}",
                 json={"deactivated": True},
@@ -63,3 +61,13 @@ def handle_status_change(sender, instance, created, **kwargs):
                     settings.DEFAULT_FROM_EMAIL,
                     [settings.ADMIN_EMAIL],
                 )
+
+            try:
+                send_mail(
+                    "Registration Denied",
+                    f"Sorry, your registration request at {settings.MATRIX_DOMAIN} has been denied.",
+                    settings.DEFAULT_FROM_EMAIL,
+                    [instance.email],
+                )
+            except SMTPRecipientsRefused:
+                pass
\ No newline at end of file
diff --git a/src/synapse_registration/registration/views.py b/src/synapse_registration/registration/views.py
index 21f4034..54f302d 100644
--- a/src/synapse_registration/registration/views.py
+++ b/src/synapse_registration/registration/views.py
@@ -11,6 +11,7 @@ import requests
 
 from secrets import token_urlsafe
 from datetime import datetime, timedelta
+from smtplib import SMTPRecipientsRefused
 
 
 class LandingPageView(TemplateView):
@@ -76,22 +77,30 @@ class EmailInputView(FormView):
 
         token = token_urlsafe(32)
 
-        UserRegistration.objects.create(
+        registration = UserRegistration.objects.create(
             username=self.request.session["username"],
             email=email,
             token=token,
             ip_address=ip_address,
         )
+
         verification_link = self.request.build_absolute_uri(
             reverse_lazy("verify_email", args=[token])
         )
-        send_mail(
-            "Verify your email",
-            f"Click the link to verify your email: {verification_link}",
-            settings.DEFAULT_FROM_EMAIL,
-            [email],
-        )
-        return render(self.request, "registration/email_sent.html")
+
+        try:
+            send_mail(
+                "Verify your email",
+                f"Click the link to verify your email: {verification_link}",
+                settings.DEFAULT_FROM_EMAIL,
+                [email],
+            )
+            return render(self.request, "registration/email_sent.html")
+
+        except SMTPRecipientsRefused:
+            form.add_error("email", "Your email address is invalid, not accepting mail, or blocked by our mail server.")
+            registration.delete()
+            return self.form_invalid(form)
 
 
 class VerifyEmailView(View):