+\e$B$O\e(B @code{smtpmail-send-it} \e$B$G$9!#B>\e(B
+\e$B$K\e(B @code{message-send-mail-with-mailclient},
+@code{message-send-mail-with-mh}, @code{message-send-mail-with-qmail},
+@code{message-smtpmail-send-it} \e$B$*$h$S\e(B @code{feedmail-send-it} \e$B$,;H$($^\e(B
+\e$B$9!#\e(B
+
+\e$B4X?t\e(B @code{message-send-mail-with-sendmail} \e$B$O5-;v$r=gHVBT$A$KF~$l$?\e(B
+\e$B$j\e(B (queuing) \e$BAw?.$9$k$?$a$K!"5-;v$r\e(B @code{sendmail} \e$B%3%^%s%I$K%Q%$%W$7$^\e(B
+\e$B$9!#%m!<%+%k%7%9%F%`$,\e(B @code{sendmail} \e$B$G%a!<%k$rAw?.$9$k$h$&$K@_Dj$5$l\e(B
+\e$B$F$$$J$/$F$b!"1s3V\e(B @acronym{SMTP} \e$B%5!<%P!<$K@\B3$9$k$3$H$,$G$-$k$N$G$"$l\e(B
+\e$B$P!"\e(B@code{message-send-mail-function} \e$B$r\e(B @code{smtpmail-send-it} \e$B$K@_Dj\e(B
+\e$B$9$k$3$H$,$G$-$^$9!#\e(B@code{smtpmail} \e$B%Q%C%1!<%8$r;H$&$?$a$K@5$7$$@_Dj$,$J\e(B
+\e$B$5$l$F$$$k$+$I$&$+3NG'$7$F$/$@$5$$!#Nc$G$9\e(B:
+
+@lisp
+(setq message-send-mail-function 'smtpmail-send-it
+ smtpmail-default-smtp-server "YOUR SMTP HOST")
+@end lisp
+
+\e$B$3$l$H;w$?$b$N$K\e(B @code{message-smtpmail-send-it} \e$B$,$"$j$^$9!#\e(B
+ISP \e$B$,\e(B @acronym{POP}-before-@acronym{SMTP} \e$B$NG'>Z$rMW5a$9$k>l9g$KM-MQ$G\e(B
+\e$B$9!#\e(B@xref{POP before SMTP, , POP before SMTP, gnus-ja, The Gnus Manual}.
+
+@cindex X-Message-SMTP-Method
+\e$B$b$7J#?t$N\e(B @acronym{SMTP} \e$B@_Dj$r;H$&$3$H$,$G$-$F!"$"$k%a%C%;!<%8$O0l$D\e(B
+\e$B$N%a!<%k%5!<%P!<$r7PM3$7!"B>$N%a%C%;!<%8$OJL$N$b$N$rDL$7$F=P$7$?$$>l9g$O!"\e(B
+@samp{X-Message-SMTP-Method} \e$B%X%C%@!<$r;H$&$3$H$,$G$-$^$9!#0J2<$O%5%]!<\e(B
+\e$B%H$5$l$F$$$kCM$G$9\e(B:
+
+@table @samp
+@item smtpmail
+
+@example
+X-Message-SMTP-Method: smtp smtp.fsf.org 587
+@end example
+
+\e$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$^$9!#\e(B
+
+@item sendmail
+
+@example
+X-Message-SMTP-Method: sendmail
+@end example
+
+\e$B$3$l$O%m!<%+%k$K%$%s%9%H!<%k$5$l$F$$$k\e(B sendmail \e$B$d\e(B exim \e$B$J$I$r7PM3$7$F%a%C\e(B
+\e$B%;!<%8$rAw$j$^$9!#\e(B
+@end table