Hi Matthew, I'm pretty sure your 'gkstream.com' is wrong and that he means qkstream.com (see https://www.robtex.com/en/advisory/ip/66/171/128/130/ ). That does not seem broken. I do wonder if this domain qkstream.com used to be squatted? David Hofstee Deliverability Management MailPlus B.V. Netherlands (ESP) -----Oorspronkelijk bericht----- Van: NANOG [mailto:nanog-bounces@nanog.org] Namens Matthew Petach Verzonden: Thursday, September 10, 2015 3:20 PM Aan: Todd K Grand CC: nanog@nanog.org Onderwerp: Re: outlook.com outgoing blacklists? On Wed, Sep 9, 2015 at 9:49 AM, Todd K Grand <tgrand@tgrand.com> wrote:
I have an email server which hosts 3 domains. I have reason to believe that microsoft maintains an outgoing blacklist and would like confirmation on this.
I have had many a report that people on domains hosted on hotmail/outlook are getting messages bounced back stating that our server was unreachable. This only happens for one of the three domains hosted on our server.
I went to outlook.com and setup an account. When I create a new message and enter the recipient at that affected domain, the address immediately turns red, and when I hover over it states that the address may not be valid. This happens without ever sending a packet to our servers. The affected domain can send emails to hotmail/outlook accounts just fine.
Anybody have some recommendations on how I resolve this, as Microsoft support seems to be under technical.
Thanks,
Todd K. Grand
Certainly looks to be broken to me: mpetach@hinotori:~> nslookup -q=any gkstream.com Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: Name: gkstream.com Address: 185.53.179.7 gkstream.com nameserver = ns1.parkingcrew.net. gkstream.com text = "v=spf1 ip6:fd1b:212c:a5f9::/48 -all" gkstream.com nameserver = ns2.parkingcrew.net. gkstream.com origin = ns1.parkingcrew.net mail addr = hostmaster.gkstream.com serial = 1441890000 refresh = 28800 retry = 7200 expire = 604800 minimum = 86400 Authoritative answers can be found from: mpetach@hinotori:~> mpetach@hinotori:~> traceroute gkstream.com traceroute to gkstream.com (185.53.179.7), 64 hops max, 40 byte packets 1 ws1 (69.36.244.130) 1 ms 1 ms 1 ms 2 s0-0-0-2.core1.sjc.layer42.net (69.36.238.33) 4 ms 4 ms 4 ms 3 ge2-48.core1.sv1.layer42.net (65.50.198.5) 4 ms 4 ms 4 ms 4 te0-0-0-18.ccr21.sjc04.atlas.cogentco.com (38.104.141.145) 6 ms 41 ms 73 ms 5 be2015.ccr21.sfo01.atlas.cogentco.com (154.54.7.173) 47 ms (TOS=40!) 7 ms 7 ms 6 be2132.ccr21.mci01.atlas.cogentco.com (154.54.30.54) 57 ms 57 ms 57 ms 7 be2156.ccr41.ord01.atlas.cogentco.com (154.54.6.86) 57 ms 70 ms 57 ms 8 be2351.ccr21.cle04.atlas.cogentco.com (154.54.44.86) 75 ms 64 ms 67 ms 9 be2596.ccr21.yyz02.atlas.cogentco.com (154.54.31.54) 71 ms 71 ms 71 ms 10 be2090.ccr21.ymq02.atlas.cogentco.com (154.54.30.206) 84 ms 121 ms 161 ms 11 be2384.ccr21.lpl01.atlas.cogentco.com (154.54.44.138) 150 ms 150 ms 151 ms 12 be2182.ccr41.ams03.atlas.cogentco.com (154.54.77.245) 170 ms 170 ms 169 ms 13 be2261.ccr41.fra03.atlas.cogentco.com (154.54.37.30) 164 ms 164 ms 164 ms 14 be2228.ccr21.muc03.atlas.cogentco.com (154.54.38.50) 174 ms 174 ms 174 ms 15 te0-0-0-2.agr12.muc03.atlas.cogentco.com (154.54.56.222) 173 ms te0-0-0-2.agr11.muc03.atlas.cogentco.com (154.54.56.206) 191 ms te0-0-0-2.agr12.muc03.atlas.cogentco.com (154.54.56.222) 174 ms 16 154.25.8.26 (154.25.8.26) 170 ms 154.25.8.22 (154.25.8.22) 175 ms 154.25.8.26 (154.25.8.26) 170 ms 17 149.6.156.195 (149.6.156.195) 175 ms 149.6.156.202 (149.6.156.202) 173 ms 174 ms 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 *^C * 26 ^C mpetach@hinotori:~> mpetach@hinotori:~> telnet gkstream.com 25 Trying 185.53.179.7... telnet: Unable to connect to remote host: Connection timed out mpetach@hinotori:~> Matt