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-rw-r--r--contrib/sendmail/libmilter/docs/smfi_setreply.html6
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diff --git a/contrib/sendmail/libmilter/docs/smfi_setreply.html b/contrib/sendmail/libmilter/docs/smfi_setreply.html
index 646a8f1..d5b0e24 100644
--- a/contrib/sendmail/libmilter/docs/smfi_setreply.html
+++ b/contrib/sendmail/libmilter/docs/smfi_setreply.html
@@ -75,6 +75,12 @@ Otherwise, it return MI_SUCCESS.
<td>
<ul>
<li>Values passed to smfi_setreply are not checked for standards compliance.
+<li>The message parameter should contain only printable characters,
+other characters may lead to undefined behavior.
+For example, CR or LF will cause the call to fail,
+single '%' characters will cause the text to be ignored
+(if there really should be a '%' in the string,
+use '%%' just like for <tt>printf(3)</tt>).
<li>For details about reply codes and their meanings, please see RFC's
<a href="http://www.rfc-editor.org/rfc/rfc821.txt">821</a>/
<a href="http://www.rfc-editor.org/rfc/rfc2821.txt">2821</a>
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