diff --git a/app/views/email_rejection_mailer/rejection.html.haml b/app/views/email_rejection_mailer/rejection.html.haml
index c4ae7befe4e..666dab61f40 100644
--- a/app/views/email_rejection_mailer/rejection.html.haml
+++ b/app/views/email_rejection_mailer/rejection.html.haml
@@ -1,5 +1,5 @@
 %p
-  Unfortunately, your email message to GitLab could not be processed.
+  = _("Unfortunately, your email message to GitLab could not be processed.")
 
 = markdown @reason
 = render_if_exists 'shared/additional_email_text'
diff --git a/app/views/email_rejection_mailer/rejection.text.haml b/app/views/email_rejection_mailer/rejection.text.haml
index 0e13b2a6473..8d940ef1293 100644
--- a/app/views/email_rejection_mailer/rejection.text.haml
+++ b/app/views/email_rejection_mailer/rejection.text.haml
@@ -1,4 +1,4 @@
-Unfortunately, your email message to GitLab could not be processed.
+= _("Unfortunately, your email message to GitLab could not be processed.")
 \
 = @reason
 = render_if_exists 'shared/additional_email_text'
diff --git a/changelogs/unreleased/gt-externalize-app-views-email_rejection_mailer.yml b/changelogs/unreleased/gt-externalize-app-views-email_rejection_mailer.yml
new file mode 100644
index 00000000000..8f6fbdceb54
--- /dev/null
+++ b/changelogs/unreleased/gt-externalize-app-views-email_rejection_mailer.yml
@@ -0,0 +1,5 @@
+---
+title: Externalize strings from `/app/views/email_rejection_mailer`
+merge_request: 24869
+author: George Tsiolis
+type: other
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 24ca8744414..6687cdd5feb 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -7683,6 +7683,9 @@ msgstr ""
 msgid "Undo"
 msgstr ""
 
+msgid "Unfortunately, your email message to GitLab could not be processed."
+msgstr ""
+
 msgid "Unlock"
 msgstr ""