On 2021-11-22 09:50 -0800, Kevin J. McCarthy <ke...@8t8.us> wrote: > On Mon, Nov 22, 2021 at 11:22:33AM -0600, Aaron Poffenberger wrote: > > I know this is related to Message-ID because if I go into muttrc(5) > > and put `set hostname="example.com"` and send again to > > u...@sbcglobal.net, the message goes through without issue. > > Well, setting $hostname can affect other things too. > > Without the patch, if you *just* change your $message_id_format to > "<%z...@example.com>" you are saying it goes through. Are you using $smtp_url > or a local MTA? Are there any other possible variables?
I use msmtp: set sendmail=/usr/local/bin/msmtp In my case just setting hostname was enough to fix it. Setting message_id_format would probably work as well, but it would also mean all emails sent through other email domains would have Message-IDs from a different domain. In my case I send from 5 different email domains. > > The behavior you are describing is highly unusual, as the MTA is usually > just looking at the EHLO and envelope addresses. > > > Also, as noted in my original, setting the fqdn of the Message-ID to > > the fqdn of the From address make sense. When I'm sending email from > > my laptop through gmail.com, the Message-ID picks-up the fqdn of my > > laptop rather than using gmail.com. > > The purpose of the Message-ID is to be unique. Setting to the RHS to the > local machine reduces the scope of randomness needed on the left side. > There's no need or sense behind using the from domain. Mail.app uses <GUID>@<from fqdn>. The Google web interface uses <hash>@mail.gmail.com. Notifications come from <hash>@notifications.gmail.com. > > -- > Kevin J. McCarthy > GPG Fingerprint: 8975 A9B3 3AA3 7910 385C 5308 ADEF 7684 8031 6BDA Perhaps there's a better solution for those of use who mail through multiple email domains. The goal, then, would be to set the fqdn of the Message-ID by From. My solution automates that, but is perhaps too naive. Cheers, --Aaron
