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fix(sender): check writes in iMIP body #1182

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Merged
andrinoff merged 1 commit into from
Apr 28, 2026
+24 −8
Merged

fix(sender): check writes in iMIP body #1182

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32 changes: 24 additions & 8 deletions sender/sender.go
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Original file line number Diff line number Diff line change
Expand Up @@ -800,8 +800,12 @@ func SendCalendarReply(account *config.Account, to []string, subject, plainBody
return nil, err
}
qp := quotedprintable.NewWriter(plainPart)
fmt.Fprint(qp, plainBody)
qp.Close()
if _, err := fmt.Fprint(qp, plainBody); err != nil {
return nil, err
}
if err := qp.Close(); err != nil {
return nil, err
}

// text/calendar inline part (Outlook/Mac Mail use this)
calHeader := textproto.MIMEHeader{}
Expand All @@ -811,10 +815,16 @@ func SendCalendarReply(account *config.Account, to []string, subject, plainBody
if err != nil {
return nil, err
}
calPart.Write([]byte(clib.WrapBase64(base64.StdEncoding.EncodeToString(icsData))))
if _, err := calPart.Write([]byte(clib.WrapBase64(base64.StdEncoding.EncodeToString(icsData)))); err != nil {
return nil, err
}

altWriter.Close()
altPart.Write(altMsg.Bytes())
if err := altWriter.Close(); err != nil {
return nil, err
}
if _, err := altPart.Write(altMsg.Bytes()); err != nil {
return nil, err
}

// .ics file attachment (Gmail uses this)
attachHeader := textproto.MIMEHeader{}
Expand All @@ -825,10 +835,16 @@ func SendCalendarReply(account *config.Account, to []string, subject, plainBody
if err != nil {
return nil, err
}
attachPart.Write([]byte(clib.WrapBase64(base64.StdEncoding.EncodeToString(icsData))))
if _, err := attachPart.Write([]byte(clib.WrapBase64(base64.StdEncoding.EncodeToString(icsData)))); err != nil {
return nil, err
}

outerWriter.Close()
msg.Write(outerMsg.Bytes())
if err := outerWriter.Close(); err != nil {
return nil, err
}
if _, err := msg.Write(outerMsg.Bytes()); err != nil {
return nil, err
}

// Send via SMTP
addr := fmt.Sprintf("%s:%d", smtpServer, smtpPort)
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