diff --git a/asciidoc/asciidoc-pmg.conf b/asciidoc/asciidoc-pmg.conf
index 6c9f0bb..82db85c 100644
--- a/asciidoc/asciidoc-pmg.conf
+++ b/asciidoc/asciidoc-pmg.conf
@@ -21,7 +21,7 @@ clamav=https://www.clamav.net[ClamAV(R)]
 debian=https://www.debian.org[Debian]
 debian_nonfree_archive_area=https://www.debian.org/doc/debian-policy/ch-archive#the-non-free-archive-area[Debian's non-free archive area]
 tts=http://www.template-toolkit.org[Template Toolkit]
-smtp_rfc=https://tools.ietf.org/html/rfc5321[RFC 5321]
+rfc_5321=https://tools.ietf.org/html/rfc5321[RFC 5321]
 rfc_5322=https://tools.ietf.org/html/rfc5322[RFC 5322]
 dkim_rfc=https://tools.ietf.org/html/rfc6376[RFC 6376]
 dmarc_rfc=https://tools.ietf.org/html/rfc7489[RFC 7489]
diff --git a/pmgconfig.adoc b/pmgconfig.adoc
index 8035923..a9377c5 100644
--- a/pmgconfig.adoc
+++ b/pmgconfig.adoc
@@ -588,10 +588,11 @@ otherwise.
 Select Signing Domain::
 
 Determines whether to DKIM sign emails using the domain found in the envelope
-from or the from header in the body of the email. The envelope from is also
-known as reverse-path, see {smtp_rfc} section 3.3 and {rfc_5322} section 3.6.2.
+from or the from header of the email. The envelope from is also known as
+reverse-path and RFC5321.MailFrom (see {rfc_5321} section 3.3).
+The from header is also known as RFC5322.From (see {rfc_5322} section 3.6.2).
 +
-The envelop from of certain emails, bounces for example, can be empty. In these
+The envelope from of certain emails, bounces for example, can be empty. In these
 cases it is desirable to sign them using the domain found in the from header.
 +
 Additionally, DMARC (see {dmarc_rfc} section 3.1.1) needs the domain found in