lib/PublicInbox/View.pm | 1 +

diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index 9ca4a6a419ab49e1b1c488783d880b36df5fe92f..07023e814516c40862ed32b0c2c86ebe7ba5f4db 100644
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -545,6 +545,7 @@ 	$subj = uri_escape_utf8($subj);
 
 	my $cc = uri_escape_utf8(join(',', sort values %cc));
 	my $href = "mailto:$to?In-Reply-To=$irt&Cc=${cc}&Subject=$subj";
+	$href =~ s/%20/+/g;
 
 	my $srch = $ctx->{srch} if $ctx;
 	my $upfx = $full_pfx ? '../' : '../../';