X-Git-Url: https://git.distorted.org.uk/~mdw/stgit/blobdiff_plain/2fef9462b26126402f26140a02d3e16cdd2d9928..d6a93cae39f0cf2c1d9d61179a9066cd1e7c3508:/stgit/commands/mail.py

diff --git a/stgit/commands/mail.py b/stgit/commands/mail.py
index b3b7b49..975f8c9 100644
--- a/stgit/commands/mail.py
+++ b/stgit/commands/mail.py
@@ -199,6 +199,9 @@ def __build_cover(tmpl, total_nr, msg_id, options):
 
     headers_end = __build_address_headers(options)
     headers_end += 'Message-Id: %s\n' % msg_id
+    if options.refid:
+        headers_end += "In-Reply-To: %s\n" % options.refid
+        headers_end += "References: %s\n" % options.refid
 
     if options.version:
         version_str = ' %s' % options.version