On Thu, 3 Apr 2008, Tony Hansen wrote:
I'm looking for help answering these questions:
* How are existing IPv6-enabled mail sites actually dealing with
missing MX records?
* Are the IPv6-enabled email sites mostly following the
recommendations found in RFC 3974?
* How widespread is the use of implicit MX with AAAA records? That
is, how prevalent are email sites that do not have MX records
but do have AAAA records?
* How big is the existing IPv6-enabled email world?
* What problems, if any, has been experienced by following RFC
3974?
From my standpoint of view, the existing IPv6-enabled email world is
really small.
At the moment we are in the transition to dual-stack MTAs. Therefore I
have only data about some of our domains which are reachable by IPv6 from
the Internet. We do not send emails via IPv6 to the Internet.
- number of MTAs from which we accepted emails over IPv6: 255
- number of MTAs in addition to above, from which we rejected emails: 303
(mainly backscatter DSNs to unknown recipients)
- number of MTAs from which we accepted emails over IPv4: 44793
The MTAs, from which the data comes, are responsible for a major part of
the Munich Scientific Network with 4 universities and several colleges and
scientific institutions.
Statistics by top level domain of reverse mapping:
- accepted MTAs over IPv6 (25)
2 arpa 2 at 5 ch 2 com 1 cz 42 de
2 edu 1 es 1 fi 22 fr 3 gr 1 hr
3 hu 1 id 1 ie 19 net 4 nl 4 no
9 org 1 pl 2 pt 2 se 1 si 3 uk
121 n/a
- additional rejected IPv6-MTAs (28)
1 arpa 1 at 3 bg 4 ch 5 com 2 cz
16 de 3 dk 1 eu 3 fi 8 fr 1 gr
2 hu 1 id 4 it 15 jp 1 lt 2 my
52 net 8 nl 2 no 11 org 1 pt 3 se
1 to 1 tv 3 uk 103 n/a
- accepted MTAs over IPv4 (164)
33 ac 6 ad 25 ae 2 aero 13 ag 2 al
3 am 126 ar 2 arpa 696 at 254 au 1 aw
1 az 5 ba 149 be 41 bg 2 bh 87 biz
1 bm 2 bo 241 br 2 bt 1 bw 8 by
3 bz 217 ca 3 cat 43 cc 516 ch 32 cl
72 cn 29 co 14836 com 2 coop 4 cr 8 cu
2 cx 11 cy 212 cz 11486 de 143 dk 3 do
5 ec 1149 edu 19 ee 4 eg 224 es 1 et
150 eu 82 fi 1 fj 2 fm 509 fr 5 ge
1 gg 1 gh 2 gi 1 gl 92 gov 135 gr
1 gs 35 hk 3 hm 29 hr 149 hu 13 id
53 ie 102 il 1 im 48 in 597 info 19 int
6 ir 11 is 819 it 4 jo 549 jp 8 ke
2 kh 39 kr 1 kw 8 kz 6 lb 12 li
6 lk 40 lt 21 lu 22 lv 12 ma 6 mc
8 md 1 mg 12 mil 3 mk 1 mn 1 mo
1 mobi 1 mr 5 ms 1 mt 1 mv 57 mx
11 my 3 mz 3 na 4 name 2 nc 5929 net
474 nl 69 no 4 np 14 nu 64 nz 1 om
895 org 1 pa 14 pe 1 pg 8 ph 18 pk
315 pl 2 ps 119 pt 4 py 2 qa 65 ro
4 rs 458 ru 5 sa 1 sc 182 se 52 sg
3 sh 25 si 59 sk 1 sm 2 sn 1 st
11 su 1 sv 3 sy 1 sz 6 tc 32 th
2 tk 10 tn 7 to 58 tr 23 tv 120 tw
2 tz 71 ua 1 ug 619 uk 436 n/a 32 us
9 uy 2 va 7 ve 6 vn 1 vu 8 ws
21 yu 67 za
I hope this helps and is not to much data.
Michael Storz