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:[email protected]] Sent: Thursday, August 16, 2012 8:06 PM To: Georgios Vlachos Cc: [email protected] 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" <[email protected]> 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 > > >
smime.p7s
Description: S/MIME cryptographic signature
