(bah, code tags van het forum doen het hier niet)
Uitgeprobeerd:
[code]~ $ dig ziggo.nl mx
; <<>> DiG 9.9.5-9+deb8u5-Debian <<>> ziggo.nl mx
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56061
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 8, ADDITIONAL: 7
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;ziggo.nl. IN MX
;; ANSWER SECTION:
ziggo.nl. 3578 IN MX 50 mx.mnd.mail.iss.as9143.net.
ziggo.nl. 3578 IN MX 50 mx.tb.mail.iss.as9143.net.
~ $ telnet mx.mnd.mail.iss.as9143.net 25
Trying 212.54.34.8...
Connected to mx.mnd.mail.iss.as9143.net.
Escape character is '^]'.
220-mx18.mnd.mail.iss.as9143.net ESMTP Wed, 03 Feb 2016 08:46:39 +0100
220-Sending spam or unsolicited commercial e-mail to this server is strictly
220-prohibited by our NO UBE / NO UCE policy. Abuse will be prosecuted and/or
220 charged per attempted recipient at international postal rates.
quit
221 mx18.mnd.mail.iss.as9143.net closing connection
Connection closed by foreign host.
~ $ dig xs4all.nl mx
; <<>> DiG 9.9.5-9+deb8u5-Debian <<>> xs4all.nl mx
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1451
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 13, ADDITIONAL: 5
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;xs4all.nl. IN MX
;; ANSWER SECTION:
xs4all.nl. 697 IN MX 100 mx2.xs4all.nl.
xs4all.nl. 697 IN MX 100 mx1.xs4all.nl.
xs4all.nl. 697 IN MX 100 mx3.xs4all.nl.
xs4all.nl. 697 IN MX 100 mx4.xs4all.nl.
~ $ telnet mx2.xs4all.nl 25
Trying 194.109.24.138...
telnet: Unable to connect to remote host: Connection timed out
[/code]
... lijkt mij duidelijk: uitgaand poort 25 geblokkeerd. Ook een tcptraceroute bevestigd dit.
[Reactie gewijzigd door vanaalten op 23 juli 2024 01:07]