\e$B$3$l$O\e(B @samp{smtp.fsf.org} \e$B$N%]!<%H\e(B 587 \e$B$r7PM3$7$F%a%C%;!<%8$rAw$j$^$9!#\e(B
+@example
+X-Message-SMTP-Method: smtp smtp.fsf.org 587 other-user
+@end example
+
+\e$B$3$l$O>e$N$b$N$HF1$8$G$9$,!"G'>Z$r9T$J$&$H$-$K\e(B @samp{other-user} \e$B$r%f!<\e(B
+\e$B%6!<L>$H$7$F;H$$$^$9!#$3$l$O!"F1$8%5!<%P!<$KJ#?t$N\e(B @acronym{SMTP} \e$B%"%+%&\e(B
+\e$B%s%H$r;}$C$F$$$k>l9g$KLrN)$A$^$9!#\e(B
+
@item sendmail
@example