outlook.com outgoing blacklists?
Matthew Petach
mpetach at netflight.com
Thu Sep 10 13:19:44 UTC 2015
On Wed, Sep 9, 2015 at 9:49 AM, Todd K Grand <tgrand at 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 at 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 at hinotori:~>
mpetach at 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 at hinotori:~>
mpetach at hinotori:~> telnet gkstream.com 25
Trying 185.53.179.7...
telnet: Unable to connect to remote host: Connection timed out
mpetach at hinotori:~>
Matt
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