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-rwxr-xr-xgit-send-email.perl2
1 files changed, 1 insertions, 1 deletions
diff --git a/git-send-email.perl b/git-send-email.perl
index c5a3f766f7..e3ff44b4d0 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -1136,7 +1136,7 @@ sub smtp_auth_maybe {
# Check mechanism naming as defined in:
# https://tools.ietf.org/html/rfc4422#page-8
- if ($smtp_auth !~ /^(\b[A-Z0-9-_]{1,20}\s*)*$/) {
+ if ($smtp_auth && $smtp_auth !~ /^(\b[A-Z0-9-_]{1,20}\s*)*$/) {
die "invalid smtp auth: '${smtp_auth}'";
}