> On 17 Sep 2020, at 19:11, Viktor Dukhovni <postfix-us...@dukhovni.org> wrote:
> 
>> On Sep 17, 2020, at 9:30 PM, @lbutlr <krem...@kreme.com> wrote:
>> 
>> This may have changed, but I doubt it. If you do not have MX records
>> there are definitely mail servers out there that will not send mail
>> to you. Exchange for one at least used to refuse to deliver mail without
>> an MX record. I don't know if this is still the case as I am thankfully
>> at least 5 years from having to deal with anyone on Exchange server.
> 
> RFC 5321 was published 2008:

Oh, I am not saying they are right or compliant with the RFCs, but it 
absolutely does happen that some servers will not send mail without an MX 
record.

> dates back to April 201.  I would expect that 19 years is sufficient time
> for the news to have reached Redmond, WA.

Perhaps, but it was no the case in … checks 2014 when dealing with a Exchange 
Server of unknown version.

IIRC, craigslist also will not send emails to email addresses without MX 
records, but craigslist has many issues sending mail, so I may be remembering 
something else.

-- 
Last night I stayed up late playing poker with Tarot cards. I got a
full house and four people died.

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