if (e->from)
if (e->reply_to) from = rfc822_cpy_adr (e->reply_to); else if (e->from)
void mutt_set_followup_to (ENVELOPE *e){  ADDRESS *t = NULL;  ADDRESS *from;  /*    * Only generate the Mail-Followup-To if the user has requested it, and   * it hasn't already been set   */  if (option (OPTFOLLOWUPTO) && !e->mail_followup_to)  {    if (mutt_is_list_cc (0, e->to, e->cc))    {      /*        * this message goes to known mailing lists, so create a proper       * mail-followup-to header       */      t = rfc822_append (&e->mail_followup_to, e->to);      rfc822_append (&t, e->cc);    }    /* remove ourselves from the mail-followup-to header */    e->mail_followup_to = remove_user (e->mail_followup_to, 0);    /*     * If we are not subscribed to any of the lists in question,     * re-add ourselves to the mail-followup-to header.  The      * mail-followup-to header generated is a no-op with group-reply,     * but makes sure list-reply has the desired effect.     */    if (e->mail_followup_to && !mutt_is_list_recipient (0, e->to, e->cc))    {      if (e->from)	from = rfc822_cpy_adr (e->from);      else	from = mutt_default_from ();            if (from)      {	/* Normally, this loop will not even be entered. */	for (t = from; t && t->next; t = t->next)	  ;		t->next = e->mail_followup_to; 	/* t cannot be NULL at this point. */	e->mail_followup_to = from;      }    }        e->mail_followup_to = mutt_remove_duplicates (e->mail_followup_to);      }}