I have not been on the mutt lists for some time but I heard from Magnus Bodin that there has been some discussion of mutt vs. qmail-inject. The trouble is that mutt quotes the addresses (RFC821) for sendmail but qmail expects them unquoted. A couple of years ago I sent the attached code to the mutt-dev list. It's a little wrapper between mutt and qmail-inject which removes the quoting before giving the address to qmail-inject. set sendmail='/usr/local/sbin/muttqmail' where muttqmail compiles from the attached code
#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> void nomem() { printf("muttqmail: out of memory\n"); exit(111); } void removequote (char *d, char *s) { char c; do { c = *s++; if (c != '\"') { if (c == '\\') c = *s++; *d++ = c; } } while (c != '\0'); } void main(int argc,char **argv) { char **newargv; char **arg; int i; newargv = (char **) malloc((argc + 1) * sizeof(char *)); if (!newargv) nomem(); arg = newargv; *arg++ = "/var/qmail/bin/qmail-inject"; for (i = 1;i < argc;++i) { *arg=malloc((strlen(argv[i])+1)*sizeof(char)); if (!*arg) nomem(); removequote(*arg,argv[i]); arg++; } *arg = NULL; execv(*newargv,newargv); printf("muttqmail: unable to run qmail-inject\n"); exit(111); }