yahoo admin mail contact (or answer)
Georgios Vlachos
g.vlachos at kestrel-is.gr
Thu Aug 16 17:18:18 UTC 2012
First thing we checked and fixed (in less than 24h) was the PTR record, I forgot to mention it....
-----Original Message-----
From: Jim Ray [mailto:jim at neuse.net]
Sent: Thursday, August 16, 2012 8:06 PM
To: Georgios Vlachos
Cc: nanog at nanog.org
Subject: Re: yahoo admin mail contact (or answer)
Check reverse DNS. We had same problem with AOL.
Sent from my iPhone
On Aug 16, 2012, at 12:51 PM, "Georgios Vlachos" <g.vlachos at kestrel-is.gr> wrote:
> Hello all,
>
>
>
> We put into production a new mailserver 2 weeks ago, and we can send email
> to everybody (no complaints and testing) except yahoo!
>
>
>
> All their mailservers reset the TCP connections, before SMTP even starts.
> This happens randomly on all their mta (look below). As a sequence almost
> half the email we send to yahoo stay in the queue for a day in our
> mailserver and then get discarded (with a connection died message).
>
>
>
> We get the SYN, SYN-ACK, ACK normal handshake and then a TCP reset from
> their mailserver.
>
>
>
> Any idea or off-list contact is very welcome.
>
>
>
> From their website I could not find a way to email them.
>
>
>
> C:\Windows\system32>dig yahoo.com MX
>
>
>
> ; <<>> DiG 9.3.2 <<>> yahoo.com MX
>
> ;; global options: printcmd
>
> ;; Got answer:
>
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 970
>
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 24
>
>
>
> ;; QUESTION SECTION:
>
> ;yahoo.com. IN MX
>
>
>
> ;; ANSWER SECTION:
>
> yahoo.com. 72 IN MX 1 mta6.am0.yahoodns.net.
>
> yahoo.com. 72 IN MX 1 mta7.am0.yahoodns.net.
>
> yahoo.com. 72 IN MX 1 mta5.am0.yahoodns.net.
>
>
>
> ;; ADDITIONAL SECTION:
>
> mta6.am0.yahoodns.net. 141 IN A 66.196.118.34
>
> mta6.am0.yahoodns.net. 141 IN A 66.196.118.36
>
> mta6.am0.yahoodns.net. 141 IN A 67.195.168.230
>
> mta6.am0.yahoodns.net. 141 IN A 98.136.217.202
>
> mta6.am0.yahoodns.net. 141 IN A 98.139.54.60
>
> mta6.am0.yahoodns.net. 141 IN A 66.94.237.64
>
> mta6.am0.yahoodns.net. 141 IN A 66.94.237.139
>
> mta6.am0.yahoodns.net. 141 IN A 66.94.238.147
>
> mta7.am0.yahoodns.net. 289 IN A 98.139.54.60
>
> mta7.am0.yahoodns.net. 289 IN A 66.94.236.34
>
> mta7.am0.yahoodns.net. 289 IN A 66.94.237.64
>
> mta7.am0.yahoodns.net. 289 IN A 66.196.118.33
>
> mta7.am0.yahoodns.net. 289 IN A 66.196.118.35
>
> mta7.am0.yahoodns.net. 289 IN A 67.195.168.230
>
> mta7.am0.yahoodns.net. 289 IN A 98.136.216.26
>
> mta7.am0.yahoodns.net. 289 IN A 98.136.217.202
>
> mta5.am0.yahoodns.net. 185 IN A 66.196.118.35
>
> mta5.am0.yahoodns.net. 185 IN A 66.196.118.36
>
> mta5.am0.yahoodns.net. 185 IN A 98.136.216.25
>
> mta5.am0.yahoodns.net. 185 IN A 98.136.216.26
>
> mta5.am0.yahoodns.net. 185 IN A 98.136.217.202
>
> mta5.am0.yahoodns.net. 185 IN A 66.94.236.34
>
> mta5.am0.yahoodns.net. 185 IN A 66.94.238.147
>
> mta5.am0.yahoodns.net. 185 IN A 66.196.118.34
>
>
>
> Thank you,
>
>
>
> Georgios Vlachos
>
> ___________________________
>
> Kestrel Information Systems s.a.
>
> 340, Kifissias Ave.,
>
> 154 51, Neo Psychico, Athens
>
> Τ.: +30.210.6747740, ext. 105
>
> F.: +30.210.6771585
>
> M.: +30.6936 807513
>
>
>
> <http://www.kestrel-is.gr/> logo kestrel.jpg
>
>
>
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