Re: Amazon SES

From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2023-05-04 16:29:55

On 5/4/23 18:54, Sam Darwin via Boost wrote:
> The comments about Message-ID: , References: , and In-Reply-To:
> headers are very interesting.  "The Amazon Simple Email Service (AWS
> SES) rewrites the Message-ID header of outgoing emails."
> Consider the very first email of a thread. It arrives at the mailman
> server with a Message-ID that mentions "gmail", for example, and is
> added to the Archives. The message is sent out to all list members,
> who see a new Message-id of
> ...010f0187dca41ec8_at_[hidden]   Later replies can set
> the In-Reply-To header to refer the "@us-east-2.amazonses.com"
> Message-ID.  But the first archived message didn't yet have that ID,
> since it arrived directly at the server, not through SES. The mailman
> archives on lists.boost.org organize that first message in a separate
> thread, presumably based on the original Message-ID.

Can we disable Message-ID rewriting?

Do we know how mailgun works wrt. Message-ID and other headers?