Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Pomoc pśepytaś

Glědajśo se wobšudy pomocy. Njenapominajomy was nigda, telefonowy numer zawołaś, SMS pósłaś abo wósobinske informacije pśeraźiś. Pšosym dajśo suspektnu aktiwitu z pomocu nastajenja „Znjewužywanje k wěsći daś“ k wěsći.

Dalšne informacije
Open

How to change the maximum message size in Thunderbird for Android?

Thunderbird za Android Pśiměrjenje
Platform34 wótegronjony
ajt1047
ajt1047

I'm using Thunderbird for Android 19.2 from Google Play on Android 16.

When I try and send large-ish (around 1MB) messages they are not sent, and a notification "Failed to send some messages / Unable to Send message" appears.

This isn't a server restriction. The mail server it's connecting to is mine, and with a smaller message log entry "postfix/smtps/smtpd" appears. With larger messages no SMTP connection is attempted and no such message occurs.

How do I configure the size at which this occurs?

I'm using Thunderbird for Android 19.2 from Google Play on Android 16. When I try and send large-ish (around 1MB) messages they are not sent, and a notification "Failed to send some messages / Unable to Send message" appears. This isn't a server restriction. The mail server it's connecting to is mine, and with a smaller message log entry "postfix/smtps/smtpd" appears. With larger messages no SMTP connection is attempted and no such message occurs. How do I configure the size at which this occurs?

Wšykne wótegrona (3)

Platform34
Platform34
  • Jaden z 25 nejlěpšych sobustatkujucych

There's no setting that limits / configures the size of messages that can be sent.

The only size related setting governs fetched messages. settings > account > fetching mail > fetch messages up to: 32KiB

What element is taking up the bulk of the emails size? The text, inline or attached images, file attachments?

I've tried to recreate your issue by sending an email with a 3MB attachment which sent successfully. I've also forwarded an email containing 1MB of plain text in the email body, which also sent successfully.

The app did have some issues when pasting the 1MB of plain text into the message compose screen. The compose screen just closed itself, possible by crashing.

It doesn't sound like this was an issue for you since you managed to click the send button.

ajt1047
ajt1047 Pšašaŕ

It was a large picture - I was sharing from Samsung Gallery. The email sat in Thunderbird's outbox (and then "Failed to send some messages / Unable to Send message" appeared as a notification).

Platform34
Platform34
  • Jaden z 25 nejlěpšych sobustatkujucych

Thanks.

I tried unsuccessfully to reproduce by sending a large 2.2MB 1920x1080 wallpaper image. The email sent without issue.

Was your experience a one time issue or something that happens with every large image?

There's some reports on github of emails sending successfully, but get stuck in the outbox, generating the failed to send message. See ticket #9230 and #11037.

It sounds like your issue is different as your email didn't actually send.

You could open a new github ticket for your issue, or add to one of the above if you think they reflect your issue.

Stajśo pšašanje

Musyśo se pla swójogo konta pśizjawiś, aby na pśinoski wótegronił. Pšosym stajśo pšašanje, jolic hyšći njamaśo wužywaŕske konto.