diff --git a/smtpserver/server.go b/smtpserver/server.go
index 952eedd..d97f786 100644
--- a/smtpserver/server.go
+++ b/smtpserver/server.go
@@ -1579,7 +1579,7 @@ func (c *conn) cmdData(p *parser) {
 		}
 	}
 
-	if Localserve {
+	if Localserve && moxvar.Pedantic {
 		// Require that message can be parsed fully.
 		p, err := message.Parse(c.log, false, dataFile)
 		if err == nil {