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-rw-r--r--doc/doc-docbook/spec.xfpt5
1 files changed, 4 insertions, 1 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 62258dd61..9eb0b6b56 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -31564,8 +31564,11 @@ the message modifier cannot override the 221 response code.
The text in a &%message%& modifier is literal; any quotes are taken as
literals, but because the string is expanded, backslash escapes are processed
-anyway. If the message contains newlines, this gives rise to a multi-line SMTP
+anyway.
+If the message contains newlines, this gives rise to a multi-line SMTP
response.
+A long message line will also be split into multi-line SMTP responses,
+on word boundaries if possible.
.vindex "&$acl_verify_message$&"
While the text is being expanded, the &$acl_verify_message$& variable