t@tt

[pne]

Seen here:

Worst. Name. Ever:

notme:

I don't think any TLD actually does that, though.

$ dig mx tt

There are 21 TLDs that do it.

ai = 10 mail.offshore.ai.



as = 30 lhr.relay.gdns.net.



cf = 10 mail.intnet.cf.



dj = 10 relais2.intnet.dj.

      5 smtp.intnet.dj.



dm = 10 mail.nic.dm.



gp = 20 manta.outremer.com.

      5 ns1.nic.gp.

     10 ns34259.ovh.net.



gt = 10 mail.gt.



hr = 10 alpha.carnet.hr.



io = 10 mailer2.io.



kh = 10 ns1.dns.net.kh.



km = 110 bow.snpt.km.

     100 mail1.comorestelecom.km.



mh = 30 mx2.mail.twtelecom.net.

     10 imap.pwke.twtelecom.net.

     20 mx1.mail.twtelecom.net.



mq = 10 mx1-mq.mediaserv.net.



ne = 20 bow.rain.fr.

     10 bow.intnet.ne.



pa = 5 ns.pa.



td = 10 mail.intnet.td.

     20 bow.rain.fr.



tk = 100 atafu.taloha.tk.



tt = 10 66-27-54-142.san.rr.com.

      0 66-27-54-138.san.rr.com.



ua =  5 km.nic.net.ua.

     20 mx1.he.kolo.net.



va = 10 lists.vatican.va.

     20 paul.vatican.va.

     50 proxy2.urbe.it.

     90 john.vatican.va.



ws = 10 mail.worldsite.ws.