On 2022-03-21 at 10:01:58 UTC-0400 (Mon, 21 Mar 2022 14:01:58 -0000)
<robertowenbere...@gmail.com>
is rumored to have said:
Does the list support plus addressing?
What do you mean by that question???
"Plus addressing" is only relevant to final local delivery and in some
cases to intra-realm bespoke mail routing. Address local-parts MUST
NEVER be interpreted as anything but opaque nonces unless they are in
"your" domains. Do not attempt to parse, validate, translate, or
canonicalize local-parts in other people's domains.
A mailing list MUST NOT generically equate two local-parts in a
non-local domain without the explicit permission of the users whose
addresses are being equated.
Google and O365 support plus addressing.
That is not relevant to a mailing list not operated by Google or MS.
Support for plus-addressing has been widespread for decades. If it isn't
YOUR plussed address, it's just an address. The plus in the local part
is none of your business. Do not touch it. You cannot know how an
address owner is handling plussed addresses unless they tell you, and
that does not mean unless their mail provider tells you.
This allows someone to subscribe as myself+li...@mycompany.com when
their real email address is mys...@company.com.
Yes. I do something similar and have for decades. Every list I subscribe
to uses a different address, all of which ultimately deliver to
mailboxes in the same IMAP account. I abandoned the '+' as a delimiter
some years ago because of the bad habit of some mail handlers of trying
to disassemble plussed addresses.
The problem is that when they reply, or generate a new message, it may
be held or rejected because it is coming from an address different
than they subscribed with.
That is 100% the sender's problem. If they can't send and receive mail
with the address they used to subscribe, they should never have used it
to subscribe. It's fine to accommodate specific individuals' incapacity
to use their addressing flexibility as designed.
If a MUA doesn't support sending mail with arbitrary plus addressing, it
doesn't really support plus addressing. That includes webmail MUAs like
GMail and MS365/OWA. Desktop MUAs have been supporting this since Eudora
v1.0, so it's hardly a novel feature.
I am aware of the hack at:
https://wiki.list.org/DOC/How%20can%20I%20post%20from%202%20or%20more%20addresses%20to%20a%20%22members-only%22%20list%3F
However this does not appeal to the tinfoil hat crowd who thinks you
are just going to sell both addresses.
Nor do I want to explain to the masses this hack.
The only reason to do that is to accommodate individuals who
specifically want it and/or who chronically send with a wrong address
and so clearly need it.
The idea of a discussion mailing list 'selling addresses' is silly.
Without significant customization any subscriber to a discussion mailing
list using Mailman or similar tools can see the address of every person
posting to the list. If one uses an email address in a public way for
long enough, it will get to spammers. Even if you don't use it publicly,
spammers may land on it with guesses and other users might typo their
addresses to yours when giving it to others.
--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
------------------------------------------------------
Mailman-Users mailing list -- mailman-users@python.org
To unsubscribe send an email to mailman-users-le...@python.org
https://mail.python.org/mailman3/lists/mailman-users.python.org/
Mailman FAQ: http://wiki.list.org/x/AgA3
Security Policy: http://wiki.list.org/x/QIA9
Searchable Archives: https://www.mail-archive.com/mailman-users@python.org/
https://mail.python.org/archives/list/mailman-users@python.org/
