"Open Message in Conversation" / "Message threads" doesn't work when I use AWS SES to send

np5 — Mon, 31 Jul 2023 14:48:39 GMT

It appears that since I'm using AWS SES to send messages, the "Open Message in Conversation" / "Message threads" has become totally useless to me.

For example, for this specific message thread:

I've sent the message that is starred, and then I received the 2 replies above.

I right-clicked on the starred message, selected "Open Message in Conversation", and...

Even in the normal view, if I turn on the "Toggle message threads", they show separately:

This is very likely because the email I sent contains this:

> Message-ID: <xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxx@mydomain.com>

But their reply contains this:

> References: <xxxxxxxxxx-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxx-000000@us-west-2.amazonses.com>
> In-Reply-To: <xxxxxxxxxx-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxx-000000@us-west-2.amazonses.com>

As the Message-ID is replaced by AWS SES at the time of sending the email.

However, if:

1) the subject is the same (ignoring "Re:" and "Fwd:")

2) the sender matches the "To:"

Shouldn't Thunderbird keep the messages in the same thread?

Otherwise, if anyone has any suggestions on how to improve this, that would be appreciated 😊

Thank you!

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"Open Message in Conversation" / "Message threads" doesn't work when I use AWS SES to send