diff --git a/GNUmakefile b/GNUmakefile
index 6d96d60..d730bd1 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -6,7 +6,7 @@ OS := $(shell uname)
 
 ifeq ($(OS),OpenBSD)
 LOCALBASE=/usr/local
-CFLAGS+=-I$(LOCALBASE)/include -pthread
+override CFLAGS+=-I$(LOCALBASE)/include -pthread
 LDLIBS=-L$(LOCALBASE)/lib -liconv -pthread
 endif
 
diff --git a/man/mshow.1 b/man/mshow.1
index ef439ed..dbb0d9d 100644
--- a/man/mshow.1
+++ b/man/mshow.1
@@ -8,7 +8,7 @@
 .Nm
 .Op Fl h Ar headers
 .Op Fl A Ar mimetypes
-.Op Fl nqrHLN
+.Op Fl nqrFHLN
 .Op Ar msgs\ ...
 .Nm
 .Fl x Ar msg
@@ -62,6 +62,8 @@ Don't render the body, stop after header output.
 .It Fl r
 Don't render the body, print raw body.
 This may be dangerous to use on a tty.
+.It Fl F
+Don't apply filters to MIME parts.
 .It Fl H
 Don't decode the headers, print all raw headers.
 This may be dangerous to use on a tty.
diff --git a/mcom b/mcom
index 6fe2b84..fb7ec8d 100755
--- a/mcom
+++ b/mcom
@@ -38,6 +38,23 @@ needs_multipart() {
 		grep -q '^#[^ ]*/[^ ]* ' "$1"
 }
 
+do_mime() {
+	if needs_multipart "$draft"; then
+		(
+			IFS='
+'
+			msed '/attach/d' $draft
+			for f in $(mhdr -M -h attach $draft); do
+				printf '#%s %s\n' \
+				       "$(file -Lbi $f | sed 's/ //g')" \
+				       "$f"
+			done
+		) | mmime >$draftmime
+	else
+		mmime -r <"$draft" >"$draftmime"
+	fi
+}
+
 MBLAZE=${MBLAZE:-$HOME/.mblaze}
 
 sendmail=$(mhdr -h sendmail "$MBLAZE/profile")
@@ -173,6 +190,7 @@ fi
 	fi
 } >$draft
 
+automime=
 c=e
 while :; do
 	case "$c" in
@@ -183,7 +201,7 @@ while :; do
 		esac
 
 		if [ -e $draftmime ]; then
-			if [ $draft -ot $draftmime ]; then
+			if [ $draft -ot $draftmime ] || [ "$automime" -eq 1 ]; then
 				stampdate $draftmime
 				if $sendmail <$draftmime; then
 					if [ "$outbox" ]; then
@@ -227,20 +245,7 @@ while :; do
 		exit 1
 		;;
 	m|mime)
-		if needs_multipart "$draft"; then
-			(
-				IFS='
-'
-				msed '/attach/d' $draft
-				for f in $(mhdr -M -h attach $draft); do
-					printf '#%s %s\n' \
-					       "$(file -Lbi $f | sed 's/ //g')" \
-					       "$f"
-				done
-			) | mmime >$draftmime
-		else
-			mmime -r <"$draft" >"$draftmime"
-		fi
+		do_mime
 		mshow -t $draftmime
 		c=
 		;;
@@ -249,6 +254,12 @@ while :; do
 		if ! ${EDITOR:-vi} $draft; then
 			c=c
 		fi
+		if mmime -c <$draft; then
+			automime=
+		else
+			automime=1
+			do_mime
+		fi
 		;;
 	d|delete)
 		rm -i $draft
@@ -278,7 +289,7 @@ while :; do
 		c=
 		;;
 	*)
-		printf 'What now? ([s]end, [c]ancel, [d]elete, [e]dit, [m]ime, sign, encrypt) '
+		printf 'What now? (%s[s]end, [c]ancel, [d]elete, [e]dit, [m]ime, sign, encrypt) ' "${automime:+mime and }"
 		read -r c
 		;;
 	esac
diff --git a/mflow.c b/mflow.c
index 6a9d55b..6405b28 100644
--- a/mflow.c
+++ b/mflow.c
@@ -188,7 +188,7 @@ main(int argc, char *argv[])
 			continue;
 		}
 
-		if (rd > 0 && line[rd-1] == ' ') {  // flowed line
+		if (reflow && rd > 0 && line[rd-1] == ' ') {  // flowed line
 			if (delsp)
 				line[--rd] = 0;
 			flowed(quotes, line, rd);
diff --git a/mmime.c b/mmime.c
index e6204ed..fcd593b 100644
--- a/mmime.c
+++ b/mmime.c
@@ -86,8 +86,11 @@ int gen_qp(uint8_t *s, off_t size, int maxlinelen, int linelen)
 		}
 
 		if ((s[i] > 126) ||
-		    (s[i] < 32 && s[i] != '\n' && s[i] != '\t') ||
-		    (s[i] == '=')) {
+		    (s[i] == '=') ||
+		    (linelen == 0 &&
+		     (strncmp((char *)s, "From ", 5) == 0 ||
+	             (s[i] == '.' && i+1 < size &&
+		      (s[i+1] == '\n' || s[i+1] == '\r'))))) {
 			printf("=%02X", s[i]);
 			linelen += 3;
 			prev = s[i];
@@ -100,6 +103,18 @@ int gen_qp(uint8_t *s, off_t size, int maxlinelen, int linelen)
 			putc_unlocked('_', stdout);
 			linelen++;
 			prev = '_';
+		} else if (s[i] < 33 && s[i] != '\n') {
+			if ((s[i] == ' ' || s[i] == '\t') &&
+			    i+1 < size &&
+			    (s[i+1] != '\n' && s[i+1] != '\r')) {
+				putc_unlocked(s[i], stdout);
+				linelen += 1;
+				prev = s[i];
+			} else {
+				printf("=%02X", s[i]);
+				linelen += 3;
+				prev = '_';
+			}
 		} else if (s[i] == '\n') {
 			if (prev == ' ' || prev == '\t')
 				puts("=");
diff --git a/mshow.c b/mshow.c
index a759181..6407080 100644
--- a/mshow.c
+++ b/mshow.c
@@ -19,6 +19,7 @@
 static int rflag;
 static int Rflag;
 static int qflag;
+static int Fflag;
 static int Hflag;
 static int Lflag;
 static int Nflag;
@@ -728,12 +729,13 @@ main(int argc, char *argv[])
 	pid_t pid1 = -1, pid2 = -1;
 
 	int c;
-	while ((c = getopt(argc, argv, "h:A:qrtHLNx:O:Rn")) != -1)
+	while ((c = getopt(argc, argv, "h:A:qrtFHLNx:O:Rn")) != -1)
 		switch (c) {
 		case 'h': hflag = optarg; break;
 		case 'A': Aflag = optarg; break;
 		case 'q': qflag = 1; break;
 		case 'r': rflag = 1; break;
+		case 'F': Fflag = 1; break;
 		case 'H': Hflag = 1; break;
 		case 'L': Lflag = 1; break;
 		case 'N': Nflag = 1; break;
@@ -744,7 +746,7 @@ main(int argc, char *argv[])
 		case 'n': nflag = 1; break;
 		default:
 			fprintf(stderr,
-			    "Usage: mshow [-h headers] [-A mimetypes] [-nqrHLN] [msgs...]\n"
+			    "Usage: mshow [-h headers] [-A mimetypes] [-nqrFHLN] [msgs...]\n"
 			    "	    mshow -x msg parts...\n"
 			    "	    mshow -O msg parts...\n"
 			    "	    mshow -t msgs...\n"
@@ -795,7 +797,7 @@ main(int argc, char *argv[])
 	} else if (Rflag) { // render for reply
 		blaze822_loop(argc-optind, argv+optind, reply);
 	} else { // show
-		if (!(qflag || rflag)) {
+		if (!(qflag || rflag || Fflag)) {
 			char *f = getenv("MAILFILTER");
 			if (!f)
 				f = blaze822_home_file("filter");
diff --git a/rfc2047.c b/rfc2047.c
index 0d5bea5..6d4760a 100644
--- a/rfc2047.c
+++ b/rfc2047.c
@@ -41,9 +41,9 @@ blaze822_decode_qp(char *start, char *stop, char **deco, size_t *decleno, int un
 			unsigned char c2 = s[2];
 			s += 3;
 			if (c1 > 127 || c2 > 127 || hex[c1] < 0 || hex[c2] < 0) {
-				*buf++ = '?';
-				*buf++ = '?';
-				*buf++ = '?';
+				*buf++ = '=';
+				*buf++ = c1;
+				*buf++ = c2;
 				continue;
 			}
 			*buf++ = (hex[c1] << 4) | hex[c2];