On Wed, 18 Mar 2020, Frank Ch. Eigler via Gcc wrote: > > Out of curiousity, is this rewriting you are talking about the cause for a > > lot of mails showing up as "From: GCC List" rather than their real senders? > > This has become very annoying recently. > > Yes, for emails from domains with declared interest in email > cleanliness, via DMARC records in DNS. We have observed mail > -blocked- at third parties, even just days ago, when we failed to > sufficiently authenticate outgoing reflected emails. > > AIUI, all this effort is driven by wanting to defeat not just spammers > but also real security problems like phishing enabled by forgery, > including specifically the From: header.
And it has actually broken GCC's patchwork: <http://patchwork.ozlabs.org/project/gcc/list/>, which I used to use to track my patches. Now I cannot do that anymore as patches submitted from my WDC address are marked as coming from <gcc-patc...@gcc.gnu.org>, which obviously means they are not attributed to me. I am fairly sure it breaks `git am' too, requiring a `From' override in the change description for author attribution in patch application to work reliably (I tend to work on my outbox when applying my own patches, so I avoid this issue, but I am sure the issue will hit someone sooner or later). And of course I cannot use the `macro@' pattern anymore to select mailing list messages in my inbox that I sent myself. Frankly it's the least of the annoyances, but still, and they all add up. This is all silly, requiring the SMTP envelope sender to match the `From' header breaks even the most basic e-mail mechanisms like the use of a `.forward' file. Can we please do something about it? Is functional regression the price we absolutely need to pay for progress? How come the Linux kernel people who do e-mail patch management on a vastly larger scale than we do, both in terms of traffic and the number of mailing list subscribers, can get away without all these odd quirks in their list server management? Perhaps it would be good asking them how they handle their stuff? Maciej
