diff -r 6e40c68b40b9 -r 4d0d4e12c1ec data/dictionary.xml
--- a/data/dictionary.xml	Mon Aug 12 21:54:13 2013 +0200
+++ b/data/dictionary.xml	Mon Aug 12 22:04:45 2013 +0200
@@ -245,7 +245,13 @@
 	</concept>
 	<concept>
 		<term abbreviation="MSA" completeForm="message submission agent " language="en"/>
-		<explanation language="en"><text></text></explanation>
+		<explanation language="en">
+			<text>
+				a software component dedicated to receive e-mails from MUA;
+				cooperates with MTA or is often integrated in MTA as one of its features;
+				uses a variant of SMTP (RFC 6409) and TCP port 587 (different than SMTP/MTA port 25)
+			</text>
+		</explanation>
 		<tag>computer</tag>
 		<tag>messaging</tag>
 	</concept>