diff --git a/bot/email.go b/bot/email.go
index 9b5639a..449f7d6 100644
--- a/bot/email.go
+++ b/bot/email.go
@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	"maunium.net/go/mautrix/event"
-	"maunium.net/go/mautrix/format"
 	"maunium.net/go/mautrix/id"
 
 	"gitlab.com/etke.cc/postmoogle/utils"
@@ -27,39 +26,6 @@ const (
 	eventFromKey      = "cc.etke.postmoogle.from"
 )
 
-func email2content(email *utils.Email, cfg roomSettings, threadID id.EventID) *event.Content {
-	var text strings.Builder
-	if !cfg.NoSender() {
-		text.WriteString("From: ")
-		text.WriteString(email.From)
-		text.WriteString("\n\n")
-	}
-	if !cfg.NoSubject() {
-		text.WriteString("# ")
-		text.WriteString(email.Subject)
-		text.WriteString("\n\n")
-	}
-	if email.HTML != "" && !cfg.NoHTML() {
-		text.WriteString(format.HTMLToMarkdown(email.HTML))
-	} else {
-		text.WriteString(email.Text)
-	}
-
-	parsed := format.RenderMarkdown(text.String(), true, true)
-	parsed.RelatesTo = utils.RelatesTo(cfg.NoThreads(), threadID)
-
-	content := event.Content{
-		Raw: map[string]interface{}{
-			eventMessageIDkey: email.MessageID,
-			eventInReplyToKey: email.InReplyTo,
-			eventSubjectKey:   email.Subject,
-			eventFromKey:      email.From,
-		},
-		Parsed: parsed,
-	}
-	return &content
-}
-
 // SetSMTPAuth sets dynamic login and password to auth against built-in smtp server
 func (b *Bot) SetMTA(mta utils.MTA) {
 	b.mta = mta
@@ -100,8 +66,7 @@ func (b *Bot) Send2Matrix(ctx context.Context, email *utils.Email) error {
 			b.setThreadID(roomID, email.MessageID, threadID)
 		}
 	}
-
-	content := email2content(email, cfg, threadID)
+	content := email.Content(threadID, cfg.ContentOptions())
 	eventID, serr := b.lp.Send(roomID, content)
 	if serr != nil {
 		return utils.UnwrapError(serr)
@@ -220,7 +185,7 @@ func (b *Bot) sendFiles(ctx context.Context, roomID id.RoomID, files []*utils.Fi
 			MsgType:   event.MsgFile,
 			Body:      req.FileName,
 			URL:       resp.ContentURI.CUString(),
-			RelatesTo: utils.RelatesTo(noThreads, parentID),
+			RelatesTo: utils.RelatesTo(!noThreads, parentID),
 		})
 		if err != nil {
 			b.Error(ctx, roomID, "cannot send uploaded file %s: %v", req.FileName, err)
diff --git a/bot/settings_room.go b/bot/settings_room.go
index 4423c80..411d33d 100644
--- a/bot/settings_room.go
+++ b/bot/settings_room.go
@@ -67,6 +67,21 @@ func (s roomSettings) NoFiles() bool {
 	return utils.Bool(s.Get(roomOptionNoFiles))
 }
 
+// ContentOptions converts room display settings to content options
+func (s roomSettings) ContentOptions() *utils.ContentOptions {
+	return &utils.ContentOptions{
+		HTML:    !s.NoHTML(),
+		Sender:  !s.NoSender(),
+		Subject: !s.NoSubject(),
+		Threads: !s.NoThreads(),
+
+		FromKey:      eventFromKey,
+		SubjectKey:   eventSubjectKey,
+		MessageIDKey: eventMessageIDkey,
+		InReplyToKey: eventInReplyToKey,
+	}
+}
+
 func (b *Bot) getRoomSettings(roomID id.RoomID) (roomSettings, error) {
 	cfg := b.cfg.Get(roomID.String())
 	if cfg != nil {
diff --git a/utils/email.go b/utils/email.go
index 3e60e95..b70d156 100644
--- a/utils/email.go
+++ b/utils/email.go
@@ -8,6 +8,9 @@ import (
 	"time"
 
 	"github.com/emersion/go-msgauth/dkim"
+	"maunium.net/go/mautrix/event"
+	"maunium.net/go/mautrix/format"
+	"maunium.net/go/mautrix/id"
 )
 
 // MTA is mail transfer agent
@@ -30,6 +33,21 @@ type Email struct {
 	Files     []*File
 }
 
+// ContentOptions used to convert email to matrix event content
+type ContentOptions struct {
+	// On/Off
+	Sender  bool
+	Subject bool
+	HTML    bool
+	Threads bool
+
+	// Keys
+	MessageIDKey string
+	InReplyToKey string
+	SubjectKey   string
+	FromKey      string
+}
+
 // NewEmail constructs Email object
 func NewEmail(messageID, inReplyTo, subject, from, to, text, html string, files []*File) *Email {
 	email := &Email{
@@ -55,6 +73,40 @@ func NewEmail(messageID, inReplyTo, subject, from, to, text, html string, files
 	return email
 }
 
+// Content converts email to matrix event content
+func (e *Email) Content(threadID id.EventID, options *ContentOptions) *event.Content {
+	var text strings.Builder
+	if options.Sender {
+		text.WriteString("From: ")
+		text.WriteString(e.From)
+		text.WriteString("\n\n")
+	}
+	if options.Subject {
+		text.WriteString("# ")
+		text.WriteString(e.Subject)
+		text.WriteString("\n\n")
+	}
+	if e.HTML != "" && options.HTML {
+		text.WriteString(format.HTMLToMarkdown(e.HTML))
+	} else {
+		text.WriteString(e.Text)
+	}
+
+	parsed := format.RenderMarkdown(text.String(), true, true)
+	parsed.RelatesTo = RelatesTo(options.Threads, threadID)
+
+	content := event.Content{
+		Raw: map[string]interface{}{
+			options.MessageIDKey: e.MessageID,
+			options.InReplyToKey: e.InReplyTo,
+			options.SubjectKey:   e.Subject,
+			options.FromKey:      e.From,
+		},
+		Parsed: parsed,
+	}
+	return &content
+}
+
 // Compose converts email object to string and (optionally) signs it
 func (e *Email) Compose(privkey string) string {
 	domain := strings.SplitN(e.From, "@", 2)[0]
diff --git a/utils/matrix.go b/utils/matrix.go
index 47e4f03..3af5de4 100644
--- a/utils/matrix.go
+++ b/utils/matrix.go
@@ -7,22 +7,22 @@ import (
 )
 
 // RelatesTo block of matrix event content
-func RelatesTo(noThreads bool, parentID id.EventID) *event.RelatesTo {
+func RelatesTo(threads bool, parentID id.EventID) *event.RelatesTo {
 	if parentID == "" {
 		return nil
 	}
 
-	if noThreads {
+	if threads {
 		return &event.RelatesTo{
-			InReplyTo: &event.InReplyTo{
-				EventID: parentID,
-			},
+			Type:    event.RelThread,
+			EventID: parentID,
 		}
 	}
 
 	return &event.RelatesTo{
-		Type:    event.RelThread,
-		EventID: parentID,
+		InReplyTo: &event.InReplyTo{
+			EventID: parentID,
+		},
 	}
 }