diff --git a/models/gpg_key.go b/models/gpg_key.go
index 6a5daf636..5763ef840 100644
--- a/models/gpg_key.go
+++ b/models/gpg_key.go
@@ -211,9 +211,9 @@ func parseGPGKey(ownerID int64, e *openpgp.Entity) (*GPGKey, error) {
 	emails := make([]*EmailAddress, len(e.Identities))
 	n := 0
 	for _, ident := range e.Identities {
-
+		email := strings.ToLower(strings.TrimSpace(ident.UserId.Email))
 		for _, e := range userEmails {
-			if e.Email == ident.UserId.Email && e.IsActivated {
+			if e.Email == email && e.IsActivated {
 				emails[n] = e
 				break
 			}
diff --git a/models/gpg_key_test.go b/models/gpg_key_test.go
index cc70096d0..687e0cd59 100644
--- a/models/gpg_key_test.go
+++ b/models/gpg_key_test.go
@@ -183,3 +183,42 @@ Unknown GPG key with good email
 	err = verifySign(goodSig, goodHash, cannotsignkey)
 	assert.Error(t, err, "Validate a bad signature with a kay that can not sign")
 }
+
+func TestCheckGPGUserEmail(t *testing.T) {
+	testEmailWithUpperCaseLetters := `-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v1
+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+=zHo9
+-----END PGP PUBLIC KEY BLOCK-----`
+
+	key, err := AddGPGKey(1, testEmailWithUpperCaseLetters)
+	assert.NoError(t, err)
+
+	assert.Len(t, key.Emails, 1)
+	assert.Equal(t, "user1@example.com", key.Emails[0].Email)
+}