diff --git a/release/packages/ucl/dma-all.ucl b/release/packages/ucl/dma-all.ucl
--- a/release/packages/ucl/dma-all.ucl
+++ b/release/packages/ucl/dma-all.ucl
@@ -1,4 +1,12 @@
-comment = "DMA Mail Agent Utilities"
+comment = "DragonFly Mail Agent"
 desc = <<EOD
-DMA Mail Agent Utilities
+The DragonFly Mail Agent (dma) is a lightweight mail transport agent intended
+for home and office use.  dma can accept mail from local users and deliver it
+either locally or remotely (via SMTP).  dma can be configured to route remote
+mail via an SMTP smart host, optionally using STARTTLS and/or authentication.
+
+dma does not implement an SMTP server and cannot receive mail from remote
+systems, nor act as a mail exchanger for other hosts.  If an SMTP server
+is required, or when more advanced mail routing is needed, consider using
+the $PKG_NAME_PREFIX-sendmail package instead.
 EOD
diff --git a/release/packages/ucl/libmilter-all.ucl b/release/packages/ucl/libmilter-all.ucl
--- a/release/packages/ucl/libmilter-all.ucl
+++ b/release/packages/ucl/libmilter-all.ucl
@@ -1,6 +1,7 @@
-comment = "Sendmail mail filter (milter) library"
+comment = "sendmail Mail Filter API library"
 desc = <<EOD
-The Sendmail milter interface allows a mail transport agent to filter mail
-through a separate process, called a milter.  libmilter provides support
-for applications implementing the milter interface.
+The sendmail Mail Filter API (Milter) is designed to allow third-party
+programs access to mail messages as they are being processed in order
+to filter meta-information and content.  libmilter provides support for
+applications implementing the milter interface.
 EOD
diff --git a/release/packages/ucl/sendmail-all.ucl b/release/packages/ucl/sendmail-all.ucl
--- a/release/packages/ucl/sendmail-all.ucl
+++ b/release/packages/ucl/sendmail-all.ucl
@@ -1,4 +1,15 @@
-comment = "Sendmail Utilities"
+comment = "sendmail mail transport agent"
 desc = <<EOD
-Sendmail Utilities
+The sendmail mail transport agent allows the system to send and receive mail
+for both local and remote users.   sendmail can also act as a mail exchanger
+for other hosts, and has a flexible configuration format that can be used to
+rewrite, filter or otherwise process mail before delivering it.
+
+sendmail supports multiple mail transport protocols, including Internet SMTP,
+LMTP, UUCP and DECnet.  Support for protocols other than SMTP and LMTP needs
+third-party software not shipped with the base system.
+
+When the full functionality of sendmail is not required, consider using the
+$PKG_NAME_PREFIX-dma package instead, a lightweight MTA which can send (but
+not receive) mail over SMTP.
 EOD