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@@ -16,9 +16,13 @@ Each TWiki web has an automatic email alert service that sends a list of recent
### <a name="Configuring_Outgoing_Mail"> Configuring Outgoing Mail </a>
-%WIKITOOLNAME% will use the `Net::SMTP` module in case it is installed on your system. You need to specify the `SMTPMAILHOST` variable in [[TWikiPreferences]].
+%WIKITOOLNAME% will use the <code>**Net::SMTP**</code> module if it is installed on your system. Set this with the <code>**SMTPMAILHOST**</code> variable in [[TWikiPreferences]].
-You can use an external mail program like `sendmail` in case the `Net::SMTP` module is not installed. In this case specify the `$mailProgram` in `twiki/bin/TWiki.cfg`.
+You can use an external mail program, like <code>**sendmail**</code>, if the `Net::SMTP` module is not installed. Set the program path in <code>**$mailProgram**</code> in <code>**TWiki.cfg**</code>.
+
+* %H% Net::SMTP can be easily disabled (ex: if there is an installation error) by setting <code>**SMTPMAILHOST**</code> in [[TWikiPreferences]] to an empty value.
+
+* %T% You can set a separate <code>**SMTPSENDERHOST**</code> variable to define the mail sender host (some SMTP installations require this).
### <a name="Setting_the_Automatic_Email_Sche"> Setting the Automatic Email Schedule </a>