On Tue, 22 Sep 2026 14:26:22 -0700 Ron via linux <linux [ at ] linux-ottawa [ dot ] org> wrote: > As you say, it should, but I think when using web mail (and/or the app?) > it does not do that. Right, because those are not travelling over SMTP, so RFC 5321 does not apply. All of my IP addresses are visible. My mail goes from 192.168.83.21 to 192.168.84.18 to 192.168.84.1 to 170.75.164.151 and thence to the Internet. The first three addresses are non-routable and the final one is listed in my SPF record anyway, so I don't really see what harm there is in adding the Received: headers. Regards, Dianne. To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org To visit the archives: https://lists.linux-ottawa.org