thunderbird/thunderbird-android

Attachment handling

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#10,114 opened on Nov 17, 2025

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 (3 comments) (0 reactions) (0 assignees)Kotlin (13,479 stars) (2,734 forks)batch import
good first issuetype: enhancement

Description

Checklist

  • I have used the search function to see if someone else has already submitted the same bug report.
  • I will describe the problem with as much detail as possible.

App

K-9 Mail

App version

Version 13.0 (39029)

Where did you get the app from?

F-Droid

Android version

15

Device model

peridot

Steps to reproduce

Context: automated download of attachments limited by device or app settings for various reasons, e. g. roaming (!) in a given email.

Forwarding (or reply to) the email results in loss of attachment(s). No warnings issued, no settings available to e. g. automatically download attachment (and override settings).

Expected behavior

When forwarding (or replying to) an email that has an attachment, which is not present on the device due to download restrictions (In settings), a dialogue should be started to inform the user that the attachment is not available for forwarding and allow the user to load the attachment to the device.

Actual behavior

Forwarding (or reply to) the email results in loss of attachment(s).

Logs

No log

Contributor guide

Tech stack
kotlinandroid
Domain
mobile
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Android development experienceFamiliarity with K 9 Mail codebase
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60
Research direction
Investigate the attachment handling logic in the email forwarding flow. Look at how attachments are downloaded and stored, and where the forwarding process retrieves attachments. Add a check when forwarding to see if attachment is already downloaded; if not, prompt user to download. See files in the 'app/k9mail/src/main/java/com/fsck/k9/' directory, particularly areas related to forwarding and attachment handling.
Attachment handling · thunderbird/thunderbird-android#10114 | Good First Issue