LHLO is used instead of HELO if the transport's &%protocol%& option is
set to &"lmtp"&.
+The callout may use EHLO, AUTH and/or STARTTLS given appropriate option
+settings.
+
A recipient callout check is similar. By default, it also uses an empty address
for the sender. This default is chosen because most hosts do not make use of
the sender address when verifying a recipient. Using the same address means
.next
A number of options such as &%forbid_filter_run%&, &%forbid_filter_perl%&,
&%forbid_filter_dlfunc%& and so forth which restrict facilities available to
-&_.forward_ files in a redirect router. If Exim is running on a central mail
+&_.forward_& files in a redirect router. If Exim is running on a central mail
hub to which ordinary users do not have shell access, but home directories are
NFS mounted (for instance) then administrators should review the list of these
forbid options available, and should bear in mind that the options that may