command will be given.
.PP
Although the
-/B HELO
+.B HELO
command is required by RFC\-821, many SMTP servers
do not require it. Early versions of
.I SendMail
type of username masquerading. If the user sets the
.B $USERNAME_EXTENSION
environment variable, its value will be appended to the actual login name. For
-instance, if I am \*(lqdan@company.com\*(rq, and I set
+instance, if I am \*(lqdan@example.com\*(rq, and I set
.B $USERNAME_EXTENSION
-to \*(lq\-www\*(rq, my mail will appear to come from \*(lqdan\-www@company.com\*(rq. This is meant
+to \*(lq\-www\*(rq, my mail will appear to come from \*(lqdan\-www@example.com\*(rq. This is meant
to interact with qmail's \*(lquser\-extension\*(rq feature, where mail sent to
.IR user \- string
will be delivered to