X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=lib%2FPublicInbox%2FNNTP.pm;h=d409e7828f29e2d6d75f8d8309fee027d3665c69;hb=4b8b3036ba08515eb66fb014b6ded9dc57e079b2;hp=1d07220de1ec977fb30ba296c93a989f8ddafe11;hpb=afb62cec9097de884bee427093219d598561474d;p=public-inbox.git

diff --git a/lib/PublicInbox/NNTP.pm b/lib/PublicInbox/NNTP.pm
index 1d07220d..d409e782 100644
--- a/lib/PublicInbox/NNTP.pm
+++ b/lib/PublicInbox/NNTP.pm
@@ -519,6 +519,13 @@ sub _header ($) {
 	my $hdr = $_[0]->header_obj->as_string;
 	utf8::encode($hdr);
 	$hdr =~ s/(?<!\r)\n/\r\n/sg;
+
+	# for leafnode compatibility, we need to ensure Message-ID headers
+	# are only a single line.  We can't subclass Email::Simple::Header
+	# and override _default_fold_at in here, either; since that won't
+	# affect messages already in the archive.
+	$hdr =~ s/^(Message-ID:)[ \t]*\r\n[ \t]+([^\r]+)\r\n/$1 $2\r\n/igsm;
+
 	$hdr
 }