MX records and mailservers - DNS analysis CZ 2009/09
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| MX records | |||
| MX records | IP | domains | % |
| mail2.ignum.cz | 82.117.159.67 | 28809 | 4.91 |
| mxavas.forpsi.com | 81.2.195.200 | 26717 | 4.55 |
| mx.smtp.cz | 81.31.37.214 | 22955 | 3.91 |
| in.smtp.cz | 81.95.97.102 | 22386 | 3.82 |
| 10mx.zoner.com | 217.198.112.246 | 12414 | 2.12 |
| 15mx.zoner.com | 82.208.28.74 | 12346 | 2.10 |
| mail8.ignum.cz | 217.31.49.69 | 12111 | 2.06 |
| relay.zoner.com | 217.198.112.217 | 11872 | 2.02 |
| mx1b20.thinline.cz | 82.208.47.3 | 9654 | 1.65 |
| mx1d10.thinline.cz | 88.146.119.14 | 9637 | 1.64 |
| ns3.pipni.cz | 81.0.235.35 | 8975 | 1.53 |
| aspmx.l.google.com | 209.85.218.67 | 8234 | 1.40 |
| alt1.aspmx.l.google.com | 209.85.223.5 | 7747 | 1.32 |
| mail5.ignum.cz | 217.31.49.38 | 7703 | 1.31 |
| alt2.aspmx.l.google.com | 209.85.210.56 | 7176 | 1.22 |
| aspmx2.googlemail.com | 209.85.135.27 | 7150 | 1.22 |
| aspmx3.googlemail.com | 209.85.199.27 | 6765 | 1.15 |
| mx.mitoncz.com | 87.236.194.62 | 6762 | 1.15 |
| aspmx4.googlemail.com | 209.85.219.4 | 6162 | 1.05 |
| aspmx5.googlemail.com | 209.85.210.2 | 6108 | 1.04 |
| ns2.pipni.cz | 81.0.235.34 | 5434 | 0.93 |
| mx.4w.cz | 213.151.79.37 | 5310 | 0.91 |
| ns.skok.cz | 217.11.249.217 | 5028 | 0.86 |
| mx.skok.cz | 217.11.249.220 | 5025 | 0.86 |
| mx1.savana.cz | 81.0.240.252 | 4767 | 0.81 |
| mx2.savana.cz | 81.0.240.253 | 4755 | 0.81 |
| mx.internetserver.cz | 82.208.48.67 | 4081 | 0.70 |
| mx.miton.cz | 88.86.120.133 | 4027 | 0.69 |
| backup.mail.profiwh.com | 212.80.64.110 | 3642 | 0.62 |
| relay.iol.cz | 194.228.41.114 | 3630 | 0.62 |
| MX records - IP address | |||
| IP | reverse record | domains | % |
| 82.117.159.67 | mail2.ignum.cz | 29166 | 4.97 |
| 81.2.195.200 | mxavas.forpsi.com | 26730 | 4.56 |
| 81.31.37.214 | mx.smtp.cz | 22966 | 3.91 |
| 81.95.97.102 | in.smtp.cz | 22388 | 3.82 |
| 217.198.112.246 | 10mx.zoner.com | 12414 | 2.12 |
| 82.208.28.74 | 15mx.zoner.com | 12366 | 2.11 |
| 217.31.49.69 | mongol.core.ignum.cz | 12129 | 2.07 |
| 217.198.112.217 | r5.zoner.com | 11872 | 2.02 |
| 82.208.47.3 | mx1b20.thinline.cz | 9655 | 1.65 |
| 88.146.119.14 | mx1d10.thinline.cz | 9640 | 1.64 |
| 193.86.238.3 | mail.pipni.cz | 8978 | 1.53 |
| 81.0.235.35 | ? | 8975 | 1.53 |
| 81.91.87.10 | mail.web4u.cz | 8862 | 1.51 |
| 209.85.218.67 | mail-bw0-f67.google.com | 8234 | 1.40 |
| 209.85.223.5 | mail-iw0-f5.google.com | 7747 | 1.32 |
| 217.31.49.38 | rumburak.core.ignum.cz | 7716 | 1.32 |
| 209.85.210.56 | mail-yx0-f56.google.com | 7176 | 1.22 |
| 209.85.135.27 | mu-in-f27.1e100.net | 7154 | 1.22 |
| 209.85.199.27 | ? | 6767 | 1.15 |
| 87.236.194.62 | ns.mitoncz.com | 6764 | 1.15 |
| 77.93.211.219 | b19.banan.cz | 6672 | 1.14 |
| 195.47.67.217 | sns.nethost.sk | 6511 | 1.11 |
| 81.0.235.34 | www.carrolatuning.us | 6234 | 1.06 |
| 209.85.219.4 | mail-ew0-f4.google.com | 6162 | 1.05 |
| 209.85.210.2 | mail-yx0-f2.google.com | 6108 | 1.04 |
| 213.151.79.37 | ? | 5310 | 0.91 |
| 88.208.118.122 | ? | 5304 | 0.90 |
| 89.185.231.22 | bob.onebit.cz | 5098 | 0.87 |
| 217.11.249.217 | ns.skok.cz | 5029 | 0.86 |
| 217.11.249.220 | mx1.skok.cz | 5025 | 0.86 |
| Number of MX records | ||
| result | number | % |
| domain does not have any MX record | 138708 | 23.64 |
| domain has at least 2 MX records | 249031 | 42.45 |
| domain name has only 1 MX record | 181612 | 30.96 |
| Syntax check of MX records | ||
| result | number | % |
| All MX records are syntactically correct | 429916 | 73.28 |
| some MX record has invalid syntax | 29 | 0 |
| some MX record contains IP address | 698 | 0.12 |
| unknown or not tested | 138708 | 23.64 |
| Resolve MX records to IP address | ||
| result | number | % |
| All MX records can be correctly resolved to IP address | 427427 | 72.85 |
| some domain names from MX records can't be resolved to IP address | 2183 | 0.37 |
| none of names from MX records can't be resolved to IP address | 1004 | 0.17 |
| unknown or not tested | 138737 | 23.65 |
| MX records duplicity | ||
| result | number | % |
| MX records are not duplicated | 416909 | 71.06 |
| MX records contain duplicate names | 2113 | 0.36 |
| some MX records point to the same IP address | 11592 | 1.98 |
| unknown or not tested | 138737 | 23.65 |
| TTL values of MX records | ||
| result | number | % |
| TTL values of MX records are equal | 430275 | 73.34 |
| TTL mismatch in MX records | 339 | 0.06 |
| unknown or not tested | 138737 | 23.65 |
| Reverse reverse records of MX records | ||
| result | number | % |
| Reverse records match with their IP addresses | 323973 | 55.22 |
| reverse records don't match for all MX records | 16043 | 2.73 |
| reverse records don't match for some MX records | 39945 | 6.81 |
| reverse records for some MX records don't exist | 50653 | 8.63 |
| unknown or not tested | 138737 | 23.65 |
| AAAA records presence | ||
| result | number | % |
| All mailservers have IPv6 address (AAAA records) | 5871 | 1 |
| at least one mailserver supports IPv6 (has AAAA record) | 698 | 0.12 |
| none of mailservers does not have IPv6 (AAAA record) | 424045 | 72.28 |
| unknown or not tested | 138737 | 23.65 |
| SPF records presence | ||
| result | number | % |
| domain does not have SFP or TXT (v=spf1) record | 550426 | 93.82 |
| domain has SPF record | 22 | 0 |
| domain has TXT (v=spf1) záznam | 18925 | 3.23 |
| Mail servers in DNSBL blacklists | ||
| result | number | % |
| None of mailservers is listed in any DNSBL servers thus they are not the source of spam | 430614 | 73.4 |
| Some of mailservers are listed in DNSBL | 0 | 0 |
| all mailservers are listed in DNSBL | 0 | 0 |
| unknown or not tested | 138737 | 23.65 |
(c) Petr Šťastný 2010, e-mail: 