Specifies the maximum refresh period in seconds.
Default 15.
.TP
+.B sendmail \fIPATH\fR
+The path to the Sendmail executable.
+This must support the \fB-bs\fR option (Postfix, Exim and Sendmail should all
+work).
+The default is the sendmail executable found at compile time.
+.TP
.B short_display \fICHARACTERS\fR
Defines the maximum number of characters to include in a \fBshort\fR name
part.
.B smtp_server \fIHOSTNAME\fR
The hostname (or address) of the SMTP server to use for sending mail.
The default is 127.0.0.1.
+If \fBsendmail\fR is set then that is used instead.
.TP
.B transform \fITYPE\fR \fIREGEXP\fR \fISUBST\fR [\fICONTEXT\fR [\fIREFLAGS\fR]]
Determines how names are sorted and displayed in track choice displays.