-@quotation
-\e$BLuCm\e(B: Gnus \e$B$K4^$^$l$F$$$k\e(B @file{pop3.el} \e$B$r;H$&>l9g\e(B
-\e$B$K\e(B @code{pop3-leave-mail-on-server} \e$B$rHs\e(B-@code{nil} \e$B$K@_Dj$9$k$N$O!"$"$^\e(B
-\e$B$j0UL#$,$"$j$^$;$s!#%5!<%P!<$K;D$5$l$?%a!<%k$O!"<!2s$K\e(B (\e$B2?EY$G$b\e(B) \e$B:F$S<h\e(B
-\e$B$j9~$^$l$F$7$^$$$^$9!#0lEY<h$j9~$s$@%a!<%k$rFsEY$H<hF@$7$J$$$h$&$K$9$k5!\e(B
-\e$BG=$r;}$D\e(B @file{pop3.el} \e$B$O\e(B T-gnus \e$B$K4^$^$l$F$$$^$9!#$3$l$O\e(B XEmacs \e$BMQ$K3+\e(B
-\e$BH/$5$l$?$b$N$,85$K$J$C$F$$$^$9!#$7$+$7!";DG0$J$,$iC/$,3+H/$7$?$+$,$o$+$j\e(B
-\e$B$^$;$s!#$7$?$,$C$F\e(B FSF \e$B$X$N@5<0$J8"Mx>yEO$,9T$J$o$l$F$$$J$$$N$G!"\e(BGnus \e$B$K\e(B
-\e$B4^$a$k$3$H$,$G$-$J$$$N$G$9!#\e(B
+@findex nnmail-split-fancy-with-parent
+\e$B4X?t\e(B @code{nnmail-split-fancy-with-parent} \e$B$O!"%U%)%m!<%"%C%W5-;v$r?F5-\e(B
+\e$B;v$HF1$8%0%k!<%W$K?6$jJ,$1$k$?$a$K;H$$$^$9!#%a!<%k$N?6$jJ,$1$r0l@87|L?@_\e(B
+\e$BDj$7$F$_$F$b40`z$K$O$G$-$J$$$3$H$,$"$j$^$9$M!#Nc$($P!">e;J$+$i8D?M08$F$N\e(B
+\e$B%a!<%k$,FO$$$?$H$7$^$9!#<+J,$,7H$C$F$$$k%W%m%8%'%/%H$H$OJL$NOC$G$9!#$1$l\e(B
+\e$B$I!VB>$N%a!<%k$H6hJL$G$-$k$h$&$K$3$l$3$l$3$&$$$&8@MU$rI=Bj$K=q$$$F$/$@$5\e(B
+\e$B$$!W$H>e;J$K8~$+$C$F;X?^$9$k$o$1$K$O$$$-$^$;$s$+$i!"7k6I<+J,$N<j$rHQ$o$7\e(B
+\e$B$F$R$H$D$R$H$D%a!<%k$r@5$7$$%0%k!<%W$K?6$jJ,$1$k$O$a$K$J$j$^$9!#$=$s$J$H\e(B
+\e$B$-$K$3$N4X?t$r;H$&$H!"$3$NLLE]$J:n6H$r0l%9%l%C%I$K$D$-0l2s$-$j$G:Q$^$9$3\e(B
+\e$B$H$,$G$-$^$9!#\e(B
+
+\e$B$3$N5!G=$rMxMQ$9$k$?$a$K$O!"$^$:JQ\e(B
+\e$B?t\e(B @code{nnmail-treat-duplicates} \e$B$*$h\e(B
+\e$B$S\e(B @code{nnmail-cache-accepted-message-ids} \e$B$NCM$r\e(B @code{nil} \e$B$G$O$J$$CM\e(B
+\e$B$K@_Dj$9$kI,MW$,$"$j$^$9!#$=$l$,$G$-$?\e(B
+\e$B$i\e(B @code{nnmail-split-fancy-with-parent} \e$B$r;H$C$F$_$F$/$@$5$$!#%3%m%s$r\e(B
+\e$B;H$C$F$3$s$JIw$K=q$-$^$9\e(B:
+
+@lisp
+(setq nnmail-treat-duplicates 'warn ; @r{\e$B$^$?$O\e(B @code{delete}}
+ nnmail-cache-accepted-message-ids t
+ nnmail-split-fancy
+ '(| (: nnmail-split-fancy-with-parent)
+ ;; @r{\e$B;D$j$N?6$jJ,$1J}$O$3$3$K=q$/\e(B}
+ ))
+@end lisp
+
+\e$B$3$N5!G=$O<B:]!"<!$NMM$KF/$$$F$$$^$9\e(B: \e$BJQ\e(B
+\e$B?t\e(B @code{nnmail-treat-duplicates} \e$B$NCM$,Hs\e(B-@code{nil} \e$B$N>l9g!"\e(BGnus \e$B$O8+\e(B
+\e$B$D$1$?A45-;v$N%a%C%;!<%8\e(B ID \e$B$rJQ\e(B
+\e$B?t\e(B @code{nnmail-message-id-cache-file} \e$B$G;XDj$5$l$?%U%!%$%k$K5-O?$7$^$9!#\e(B
+\e$B$3$N$H$-!"$=$l$>$l$N5-;v$,3JG<$5$l$?%0%k!<%W$NL>A0$rJ;5-$7$^$9\e(B (\e$B$?$@$7%a!<\e(B
+\e$B%k$G$O$J$$%a%C%;!<%8$N>l9g$O!"%0%k!<%WL>$O>JN,$5$l$^$9\e(B)\e$B!#$5$F!"$$$h$$$h\e(B
+\e$B%a!<%k$N?6$jJ,$1$,;O$^$k$H!"4X\e(B
+\e$B?t\e(B @code{nnmail-split-fancy-with-parent} \e$B$O!"J,3d$5$l$k3F5-;v\e(B
+\e$B$N\e(B References (\e$B$H\e(B In-Reply-To) \e$B%X%C%@!<$rD4$Y!"\e(B
+@code{nnmail-message-id-cache-file} \e$B$G;XDj$5$l$?%U%!%$%k$K$=$l$i$N%a%C%;!<\e(B
+\e$B%8\e(B ID \e$B$,$"$k$+$I$&$+D4$Y$^$9!#?F5-;v$,8+$D$+$k$H!"$=$N%0%k!<%WL>$,@55,I=\e(B
+\e$B8=\e(B @code{nnmail-split-fancy-with-parent-ignore-groups} \e$B$K9gCW$7$J$1$l$P!"\e(B
+\e$B$3$N4X?t$OBP1~$9$k%0%k!<%WL>$rJV$9$o$1$G$9!#$3$3$G!"JQ\e(B
+\e$B?t\e(B @code{nnmail-message-id-cache-length} \e$B$NCM$r%G%#%U%)%k%H$h$j$b4v$i$+\e(B
+\e$BBg$-$JCM$K@_Dj$9$k$3$H$r4+$a$^$9!#$=$&$9$k$H!":#D4$Y$i$l$?%a%C%;!<\e(B
+\e$B%8\e(B ID \e$B$?$A$O:#$7$P$i$/%-%c%C%7%e$NCf$KB8B3$G$-$^$9\e(B (5000 \e$B$K@_Dj$9$k$H%-%c%C\e(B
+\e$B%7%e%U%!%$%k$NBg$-$5$O$@$$$?$$\e(B 300 \e$B%-%m%P%$%H$0$i$$$K$J$k$_$?$$$G$9\e(B)\e$B!#\e(B
+@vindex nnmail-cache-accepted-message-ids
+\e$B$5$i$K!"JQ?t\e(B @code{nnmail-cache-accepted-message-ids} \e$B$NCM$r\e(B
+\e$BHs\e(B-@code{nil} \e$B$K@_Dj$9$l$P!"\e(BGnus \e$B$O0\F0$5$l$?5-;v$N%a%C%;!<%8\e(B ID \e$B$r$b5-\e(B
+\e$BO?$9$k$N$G!"%U%)%m!<%"%C%W5-;v$O?F5-;v$N0\F0@h$HF1$8%0%k!<%W$KF~$k$h$&$K\e(B
+\e$B$J$j$^$9!#\e(B
+
+\e$BFCDj$N%0%k!<%W$r%-%c%C%7%e$K5-O?$7$?$/$J$$>l9g$O!"JQ\e(B
+\e$B?t\e(B @code{nnmail-cache-ignore-groups} \e$B$b;2>H$7$F$/$@$5$$!#Nc$($P!"30$K=P\e(B
+\e$B$9$9$Y$F$N%a%C%;!<%8$r!H\e(Boutgoing\e$B!I%0%k!<%W$KJ]B8$7$F$$$k$N$J$i$P!"\e(B
+@code{nnmail-cache-ignore-groups} \e$B$r$=$N%0%k!<%WL>$K9gCW$9$k$h$&$K@_Dj$9\e(B
+\e$B$l$PNI$$$G$7$g$&!#$5$b$J$$$H$"$J$?$N$9$Y$F$N%a%C%;!<%8$KBP$9$kJV;v$,\e(B
+\e$B!H\e(Boutgoing\e$B!I%0%k!<%W$KF~$C$F$7$^$$$^$9!#\e(B
+
+@node Group Mail Splitting
+@subsection \e$B%0%k!<%W%a!<%kJ,3d\e(B
+@cindex mail splitting
+@cindex group mail splitting