6 ms·

This a valid email address: t AT lk.

37 points by ddol 15y ago

sp332 15y ago
Interesting that Guatemala is using GMail. And Trinidad is using RoadRunner? hahaha
metafour 15y ago
Not that I pay that much attention to TLDs but I never knew the Vatican City got its own.
- Sukotto 15y ago
  They're a sovereign state. They even have their own passports. http://en.wikipedia.org/wiki/Vatican_City http://en.wikipedia.org/wiki/Vatican_City
  - jonah 15y ago
    And the smallest at 44 hectares (110 acres)!
    - roberto 15y ago
      And it has one of the lowest age of consent in Europe: 14 years!
      - Lennie 15y ago
        They are also one of two states with a 100% IPv6 provider deployment.
dodedo 15y ago
a@b is also a valid email address. It is also a valid SMTP address, assuming you have defined "b" as a FQDN in your DNS. What we have here is a list of TLDs which have MX records, but an MX record is not even required to send mail to a FQDN. An A record will suffice, for any RFC compliant SMTP server.
RKearney 15y ago
A TLD does not need an MX record to receive mail. If the MX record does not exist, it will use the A record instead.
- Lennie 15y ago
  Do you know of a TLD with an A-record ?
  - RKearney 15y ago
    Yes, the very first one on this list, .ac http://en.wikipedia.org/wiki/List_of_Internet_top-level_domains#Country_code_top-level_domains http://en.wikipedia.org/wiki/List_of_Internet_top-level_doma... # dig ac. ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5_7.1 <<>> ac. ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37041 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;ac. IN A ;; ANSWER SECTION: ac. 86400 IN A 193.223.78.210 ;; Query time: 173 msec ;; SERVER: 10.0.80.11#53(10.0.80.11) ;; WHEN: Thu Dec 8 11:37:09 2011 ;; MSG SIZE rcvd: 36 I'm not going to go down the list and try the rest.
guylhem 15y ago
This works for Martinique. Cool. I'll try and ask the same @mq :-)
tlb 15y ago
Not on my servers. This regexp is time-honored and catches more silly mistakes than it rejects valid ones. function isValidEmail(email) { return (/^[-a-z0-9\~\!\$\%\^\&\*_\=\+\}\{\'\?]+(\.[-a-z0-9\~\!\$\%\^\&\*_\=\+\}\{\'\?]+)*@([a-z0-9_][-a-z0-9_]*(\.[-a-z0-9_]+)*\.(aero|arpa|biz|com|coop|edu|gov|info|int|mil|museum|name|net|org|pro|travel|mobi|xxx|[a-z][a-z])|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))$/i.test(email)); }
- RKearney 15y ago
  >Not on my servers. Sorry but "your servers" do not set the specifications for what is and what is not a valid email address. It always amazes me why people waste time with regular expressions to try and determine if an email address is valid or not before sending an email. The best and by far easiest way to determine if an email address is valid is to just send an email to it. Your regular expression matches invalid email addresses (like anything@____.com) and misses things like "This is valid"@example.com.
  - tzs 15y ago
    > It always amazes me why people waste time with regular expressions to try and determine if an email address is valid or not before sending an email Some of us want to check if a newly entered email address appears valid while we still have the user on our site, so if there is an obvious problem we can get it fixed. How do you address that with the "just send an email" approach? If the mail bounces, how do I contact the user to tell them to come back to the site and try again?
  - Sniffnoy 15y ago
    Sure you can validate emails by regex! :D http://ex-parrot.com/~pdw/Mail-RFC822-Address.html http://ex-parrot.com/~pdw/Mail-RFC822-Address.html
    - terinjokes 15y ago
      Except RFC822 has been updated by RFC2822, which itself has been updated by RFC5322…
DrStalker 15y ago
Last week I got into a discussion with a client over email validation rules; they wanted "contains an '@' and a '.'". Even after explaining that the '.' was optional they insisted n these rules. Which made be wonder just how many problems will be seen once companies can use vanity top level domains; if I buy the "doug" TLD how long before I give up on lost email and switch from me@doug back to me@doug.com?
rdl 15y ago
I used to have r@ai. (Anguilla; my neighbor, Vince Cate, was the registrar, and we had a 10base2 coax feed to the national root server (and his ISP).) Ian Goldberg had n@ai, which was even better.

37 points by ddol 15y ago

sp332 15y ago

Interesting that Guatemala is using GMail. And Trinidad is using RoadRunner? hahaha

metafour 15y ago

Not that I pay that much attention to TLDs but I never knew the Vatican City got its own.

Sukotto 15y ago
They're a sovereign state. They even have their own passports. http://en.wikipedia.org/wiki/Vatican_City http://en.wikipedia.org/wiki/Vatican_City
- jonah 15y ago
  And the smallest at 44 hectares (110 acres)!
  - roberto 15y ago
    And it has one of the lowest age of consent in Europe: 14 years!
    - Lennie 15y ago
      They are also one of two states with a 100% IPv6 provider deployment.

dodedo 15y ago

a@b is also a valid email address. It is also a valid SMTP address, assuming you have defined "b" as a FQDN in your DNS. What we have here is a list of TLDs which have MX records, but an MX record is not even required to send mail to a FQDN. An A record will suffice, for any RFC compliant SMTP server.

RKearney 15y ago

A TLD does not need an MX record to receive mail. If the MX record does not exist, it will use the A record instead.

Lennie 15y ago
Do you know of a TLD with an A-record ?
- RKearney 15y ago
  Yes, the very first one on this list, .ac http://en.wikipedia.org/wiki/List_of_Internet_top-level_domains#Country_code_top-level_domains http://en.wikipedia.org/wiki/List_of_Internet_top-level_doma... # dig ac. ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-16.P1.el5_7.1 <<>> ac. ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37041 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;ac. IN A ;; ANSWER SECTION: ac. 86400 IN A 193.223.78.210 ;; Query time: 173 msec ;; SERVER: 10.0.80.11#53(10.0.80.11) ;; WHEN: Thu Dec 8 11:37:09 2011 ;; MSG SIZE rcvd: 36 I'm not going to go down the list and try the rest.

guylhem 15y ago

This works for Martinique. Cool. I'll try and ask the same @mq :-)

tlb 15y ago

Not on my servers. This regexp is time-honored and catches more silly mistakes than it rejects valid ones. function isValidEmail(email) { return (/^[-a-z0-9\~\!\$\%\^\&\*_\=\+\}\{\'\?]+(\.[-a-z0-9\~\!\$\%\^\&\*_\=\+\}\{\'\?]+)*@([a-z0-9_][-a-z0-9_]*(\.[-a-z0-9_]+)*\.(aero|arpa|biz|com|coop|edu|gov|info|int|mil|museum|name|net|org|pro|travel|mobi|xxx|[a-z][a-z])|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))$/i.test(email)); }

RKearney 15y ago
>Not on my servers. Sorry but "your servers" do not set the specifications for what is and what is not a valid email address. It always amazes me why people waste time with regular expressions to try and determine if an email address is valid or not before sending an email. The best and by far easiest way to determine if an email address is valid is to just send an email to it. Your regular expression matches invalid email addresses (like anything@____.com) and misses things like "This is valid"@example.com.
- tzs 15y ago
  > It always amazes me why people waste time with regular expressions to try and determine if an email address is valid or not before sending an email Some of us want to check if a newly entered email address appears valid while we still have the user on our site, so if there is an obvious problem we can get it fixed. How do you address that with the "just send an email" approach? If the mail bounces, how do I contact the user to tell them to come back to the site and try again?
- Sniffnoy 15y ago
  Sure you can validate emails by regex! :D http://ex-parrot.com/~pdw/Mail-RFC822-Address.html http://ex-parrot.com/~pdw/Mail-RFC822-Address.html
  - terinjokes 15y ago
    Except RFC822 has been updated by RFC2822, which itself has been updated by RFC5322…

DrStalker 15y ago

Last week I got into a discussion with a client over email validation rules; they wanted "contains an '@' and a '.'". Even after explaining that the '.' was optional they insisted n these rules. Which made be wonder just how many problems will be seen once companies can use vanity top level domains; if I buy the "doug" TLD how long before I give up on lost email and switch from me@doug back to me@doug.com?

rdl 15y ago

I used to have r@ai. (Anguilla; my neighbor, Vince Cate, was the registrar, and we had a 10base2 coax feed to the national root server (and his ISP).) Ian Goldberg had n@ai, which was even better.