yahoo admin mail contact (or answer)

Georgios Vlachos g.vlachos at kestrel-is.gr
Thu Aug 16 12:18:18 CDT 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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