Re: [Asrg] Adding a spam button to MUAs

Ian Eiloart <iane@sussex.ac.uk> Mon, 08 February 2010 11:49 UTC

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Subject: Re: [Asrg] Adding a spam button to MUAs
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--On 6 February 2010 00:13:50 +0000 John Levine <johnl@taugh.com> wrote:

>> Fine with me. But you really should learn about MX records - they are
>> very useful and have been standardized for many years now.
>
> Thanks, we're familiar with them.  Perhaps you might want to
> familiarize yourself with section 5.1 of RFC 5321 which makes it quite
> clear that MX records are still optional, and any host with an A or
> AAAA record might be a mail domain.

Which is a real shame. It would be very nice to assume that a domain 
without an MX record isn't an email domain. Too late for A records, but for 
AAAA records....

>
> This is what I meant about overloading names, in your case, turning
> the host name of the POP or IMAP server into a mail domain.  Without
> some other hack like feedback@feedback.<hostname> there's no way to
> tell whether your mail host is prepared to accept feedback mail.



> R's,
> John
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> Asrg@irtf.org
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-- 
Ian Eiloart
IT Services, University of Sussex
01273-873148 x3148
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