[mailop] Anyone here from createsend ?

2022-02-05 Thread John Levine via mailop
I got a message from createsend on behalf of the Godaddy registry,
which had a DKIM signature with a screwed up key in the DNS. This is
related to new passwords for .US sub-registries so it would be
unfortunate if the broken signature made the mail disappear into spam
folders.

Details on request.

R's,
John
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Re: [mailop] 2 questions about BCC and mailing lists

2022-02-05 Thread Ángel via mailop
On 2022-01-31 at 10:43 -0700, Geoff Mulligan wrote:
> 1. If a recipient on an email message is both in the To: or Cc: and
> on the mailing list, should the listserver send the message to the
> recipient:
>   a) By default
>   b) Not by default (but configurable)
>   c) Never

Yes, it should be sent to that recipient. It's also simpler to explain
and understand. It may be annoying for some people, in which case you
might wish to make that configurable, but the default shall be to
deliver.

(The direct copy can annoying as well, since it won't have the list
headers which would easily let replying to list)

However, the more pushing issue is the security aspect. If the list
skips you when it finds you in CC I can influence the mailing list
server to send an email to everyone but you by simply including a Cc
header saying I am copying you (but not actually adding a RCPT TO: with
your address)

Or, more innocently, should the direct copy fail for some reason (we
have plenty of examples here), that person won't receive the direct
email *nor* the indirect one through the mailing list.

In such case, there should be a NDR, granted (perhaps received a week
later), but even assuming the NDR is seen and understood by the sender,
he will probably shrug and assume it will have been received through
the mailing list.


The most exotic case I remember right now happened when replying
privately to a subscriber of this list, where their tagged email
address refused receiving my email, since I wasn't mailop. The funny
thing is I was providing the contact email address they had asked for.
I had to do some twisting to get their MTA to accept the message, and
it was probably dropped anyway, since I received no response.
If I replied both directly and to the list, such configuration would
have been a problem.


> 2. If a mailing list is in the BCC: should a message be delivered to
> the 
> list:
>   a) Yes - always
>   b) No - never
>   c) Configurable
>   d) Convert it to a CC:

I'm with John here. I would reject mails not explicitly showing the
list as a recipient. You can do so when incoming, in order to avoid
backscatter.

The only legitimate case I can think of that are chained list, such as
when -users mailing list is itself a subscriber of -announce. But since
both lists would be in your platform, taking that into account
shouldn't be a problem.


Best regards


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Re: [mailop] Musings on Mail Service Operators

2022-02-05 Thread Ángel via mailop
On 2022-02-02 at 21:31 -0600, Scott Mutter wrote:
> Email - as we know it - should have been dead years ago.  But instead
> we keep adding band-aid after band-aid after band-aid to the system.

Maybe what you call a band-aid was actually preferable?


> Why is it impossible to take a look at what Instant Messaging
> protocols, SMTP, SMS do that make them successful and then blend
> those together into a new "email-like" system?

https://xkcd.com/927/

> 
> I'm not going to pretend to know what the ultimate solution might
> be.  One of the major issues with email is the address spoofing that
> goes on.  Maybe a spoofed address doesn't authenticate with SPF or
> DKIM... but that only works if EVERYONE else uses SPF and DKIM...
> that's the bandaid.  Instant messaging and SMS can't as easily be
> spoofed, they may be fake but senders have to register on the
> platform in some way (be it a Facebook account, Twitter account,
> phone number, etc).  Would more need to be done to lock this down? 
> Absolutely.  But it's at least A obstacle that potential abusers have
> to overcome.  Email doesn't have that.

We have seen *a lot* of SMS spoofing (Poland, UK, you're not alone!).
Say you receive a SMS with a spoofed sender of "MailopBank" containint
a phishing link. Your phone will fill this with all the other
(legitimate) SMS you received with a sender of "MailopBank". It's not
really the phone fault. It has no other information to tell
one "MailopBank" from the other (one might perhaps blame being able to
use text as SMS senders). It has no sending IP, no SPF, no DMARC…

The reason SMS is still in use is because it provides the lowest level
technology, for sending a code to a phone user, be that a flip phone or
the latest smartphone release.



> Email was first invented in 1971 - that's over 50 years ago.  We've
> learned a lot about how people tend to use email and how people tend
> to abuse email within the past 50 years.  Instead of adding new
> constructs to email. Why not invent a new, more modern email
> alternative?  Something that takes a lot of what we've learned from
> email usage over the years, what we've seen in instant messaging,
> SMS, and other computer communication protocols and builds on that
> from the ground up?  Wouldn't that be better than constantly adding
> band-aids to email/SMTP to fix problems that pop up?

At which point does a system become "a more modern alternative"? We
could build an email system that used protobufs rather than SMTP, for
the sake of making something new, but if it doesn't provide an
improvement over SMTP, it's better to use the extensibility mechanism
of SMTP. Compatibility is very important. If your new system can be
gradually rolled out, and is able to receive messages from the existing
systems, that will be preferable.


> I'm not a huge fan of mailing lists or distributed mailings (forums
> accomplish the same thing with less of the hassle of email
> deliverability concerns).

So you are advocating for a better email which is able to do less
things than mail?
Plus, a mailing list is just the ability of sending to multiple users.
You could easily have a WhatsApp mailing list bot replacing groups.


> Not a huge fan of automatic email forwarders/redirects, which tend to
> break SPF and DKIM.  Maybe things like these don't need to be
> allowed?

But the users *really* want to have all their messages on the same
mailbox, even if they could easily access the other mailbox. Otherwise
we wouldn't need email forwarding.



> Yet those platforms don't seem to have an issue in getting people to
> use them.  Why couldn't a properly reimagined email replacement do
> the same thing?


And email don't have an issue in getting people using it.* The issues
lie on a lower level, like not receiving /certain/ messages, or in the
management by some clients, which is interface (you will however face
some problems in getting a mail client for your new protocol that is as
good as every existing one for "traditional" mail).


* Many people don't actually know how to *properly* use email, but
that's a slightly different issue. They manage to "use" it.



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Re: [mailop] [E] Verizon contact for deliverability issue

2022-02-05 Thread Giovanni Bechis via mailop
Il 5 febbraio 2022 17:53:19 CET, Lili Crowley via mailop  ha 
scritto:
>Hey Giovanni-
>Are you looking for verizon.net or verizon.com. I can help with verizon.net.
>
>Thanks!
>
>On Sat, Feb 5, 2022 at 6:38 AM Giovanni Bechis via mailop 
>wrote:
>
>> Hi,
>> could someone at Verizon contact me off-list to track a deliverability
>> issue regarding their dns ?
>>  Thanks & regards
>>   Giovanni
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Thanks Lili,
unfortunately I am searching for a verizon.com contact.
 Thanks
 Giovanni 
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Re: [mailop] [E] Verizon contact for deliverability issue

2022-02-05 Thread Lili Crowley via mailop
Hey Giovanni-
Are you looking for verizon.net or verizon.com. I can help with verizon.net.

Thanks!

On Sat, Feb 5, 2022 at 6:38 AM Giovanni Bechis via mailop 
wrote:

> Hi,
> could someone at Verizon contact me off-list to track a deliverability
> issue regarding their dns ?
>  Thanks & regards
>   Giovanni
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-- 
Lili Crowley

she/her
Postmaster
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