We think only a record holder can know what you go through to set a record, so we only let people that
have already set world records downvote other people's records.
What can I do?
Go set a record! If you can think of it, you can set a new world record for it.
@Marc. Sorry, I don't know much about windows or mac so can't suggest of a specific mail agent there that would accept ua@au. And it looks like your failed attempt (thanks for trying!) shows that even a major MTA (but postfix! I would not have expected that!) - doesn't handle it correctly :-( I had until now thought the bugs were only at the MUA.
I think if the record includes the qualifier "useful in the real world", and probably it should, I have to fail :-( So I'm not fussed. But it remains true that au@ua is valid and "active" (get it past broken software on the sending end and I'll reply).
I just received a reply from au@ua so I can confirm that it exists and is the address of a real person.
@Marc: it looks like Postfix is looking for an A-record for ua. If so this is a bug. RFC 5321 says there is no requirement for an A-record to exist if there is an MX-record for that domain*. This was unclear in the days of RFC 822 as the RFC predates the widespread acceptance of DNS.
"If one or more MX RRs are found for a given name, SMTP systems MUST
NOT utilize any address RRs associated with that name unless they are
located using the MX RRs" - RFC 5321 Section 5.1 (http://tools.ietf.org/html/rfc5321)
My attempt to send an email to this address failed:
: Host or domain name not found. Name service error for name=ua type=A:
Host not found
Final-Recipient: rfc822; au@ua
Original-Recipient: rfc822;au@ua
Action: failed
Status: 5.4.4
Diagnostic-Code: X-Postfix; Host or domain name not found. Name service error for name=ua type=A: Host not found
Regarding U.A.'s comment, I can verify that cd1.ns.ua reports the MX record for UA to be mr.kolo.net. In other words, a server is accepting mail on behalf of the domain "ua"
@UA what mail clients on Mac or PC will allow for sending to such an address?
I've tried submitting my address "au@ua" several times. (That's
not ua.com, it's not ua "dot" anything, it's just au@ua for five characters). But this site doesn't believe it, even though it's valid.
To be fair, it's not just the site's problem; many mail agents such as microsoft outlook will not even try send to this because they expect at least one ".". Gmail has this problem too (bug reported to them). There are however Internet standards (/RFCs) covering such issues and in spite of unfamiliarity by some of the big guys, au@ua is indeed valid. Send by unix mail, for instance; I'll reply.
The TLD .io (British Indian Ocean Territory) has an MX record so somebody at the registry could give themselves a 4-letter address, e.g. a@io
If you have 1000AUD to spend then some Kiribati 3-letter domain names are available (e.g. 4.ki is available as I write) giving you the opportunity for a 6-letter address.
I myself have submitted a smaller e-mail in this category (8 characters) but that's also beaten with a quick search, any domain with 4 characters would also have emails attached to them, one published address with 6 characters is: a@3.ly for a url shortening service. There are various others x@g.gg, x@t.co etc So with that said, is the record criteria that it must be owned and maintained by a single owner and person and not a company/body?
COMMENT ON THIS RECORD
All Comments for this Record Category
U. A.
@Marc. Sorry, I don't know much about windows or mac so can't suggest of a specific mail agent there that would accept ua@au. And it looks like your failed attempt (thanks for trying!) shows that even a major MTA (but postfix! I would not have expected that!) - doesn't handle it correctly :-( I had until now thought the bugs were only at the MUA.
I think if the record includes the qualifier "useful in the real world", and probably it should, I have to fail :-( So I'm not fussed. But it remains true that au@ua is valid and "active" (get it past broken software on the sending end and I'll reply).
-Adam
Dominic Sayers
I just received a reply from au@ua so I can confirm that it exists and is the address of a real person.
@Marc: it looks like Postfix is looking for an A-record for ua. If so this is a bug. RFC 5321 says there is no requirement for an A-record to exist if there is an MX-record for that domain*. This was unclear in the days of RFC 822 as the RFC predates the widespread acceptance of DNS.
Marc
My attempt to send an email to this address failed:
: Host or domain name not found. Name service error for name=ua type=A:
Host not found
Final-Recipient: rfc822; au@ua
Original-Recipient: rfc822;au@ua
Action: failed
Status: 5.4.4
Diagnostic-Code: X-Postfix; Host or domain name not found. Name service error for name=ua type=A: Host not found
Dominic Sayers
@Marc: I sent au@ua a test email today using eM Client on my PC (http://www.emclient.com/). Seemed to go OK even though I'm using a Google account.
Marc
Regarding U.A.'s comment, I can verify that cd1.ns.ua reports the MX record for UA to be mr.kolo.net. In other words, a server is accepting mail on behalf of the domain "ua"
@UA what mail clients on Mac or PC will allow for sending to such an address?
U. A.
I've tried submitting my address "au@ua" several times. (That's not ua.com, it's not ua "dot" anything, it's just au@ua for five characters). But this site doesn't believe it, even though it's valid.
To be fair, it's not just the site's problem; many mail agents such as microsoft outlook will not even try send to this because they expect at least one ".". Gmail has this problem too (bug reported to them). There are however Internet standards (/RFCs) covering such issues and in spite of unfamiliarity by some of the big guys, au@ua is indeed valid. Send by unix mail, for instance; I'll reply.
Dominic Sayers
The TLD .io (British Indian Ocean Territory) has an MX record so somebody at the registry could give themselves a 4-letter address, e.g. a@io
If you have 1000AUD to spend then some Kiribati 3-letter domain names are available (e.g. 4.ki is available as I write) giving you the opportunity for a 6-letter address.
Go...
Rob Birdsong
Jed, email and ask him.
Jed Kronfeld
Is this the Ben Bailey from Cash Cab?
Zachary Reidell
i would have submitted z-@q.com, but it would have tied your record.
Corey Henderson
Good catch Peter. I just tried to email that address from two separate accounts they got bounced both times.
Peter Craig
The record holder for this needs to be given a name, not a web address - also the domain a.pt isn't even registered...
Peter Craig
j.mp was another 4chr domain...
Peter Craig
I myself have submitted a smaller e-mail in this category (8 characters) but that's also beaten with a quick search, any domain with 4 characters would also have emails attached to them, one published address with 6 characters is: a@3.ly for a url shortening service. There are various others x@g.gg, x@t.co etc So with that said, is the record criteria that it must be owned and maintained by a single owner and person and not a company/body?
Corey Henderson
My college email address would have tied this one. I wish I still had it. cor@bu.edu