diff --git a/layouts/_default/single.gmi b/layouts/_default/single.gmi
index 9462f0b..29e32ab 100644
--- a/layouts/_default/single.gmi
+++ b/layouts/_default/single.gmi
@@ -33,9 +33,10 @@
   {{- $scratch.Set "ref" (add $ref 1) -}}
 {{- end -}}
 {{- $content := $scratch.Get "content" | replaceRE `\[(.+?)\]\((.+?)\) #(\d+)` "$1 [$3]" -}}{{/* replace inline links with footnote */}}
-{{- $content | safeHTML -}}
+{{- $content | safeHTML }}
 ---
-=> mailto:blog@runtimeterror.dev 📧 Reply via email
+{{ $subject := printf "Re: %s" .Title }}
+=> mailto:blog@runtimeterror.dev?subject={{ urlquery $subject | replaceRE `\+` "%20" }} 📧 Reply via email
 
 ## Bibliography
 {{ $scratch.Set "ref" 1 -}}