Am 09.04.2015 um 13:20 schrieb Frank Elsner:
On Thu, 9 Apr 2015 12:47:15 +0200 Peter Ulrich Kruppa wrote:
[ ... ]
Yes: when I use telnet on port 25 from my Fedora I get
# telnet localhost 25
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 pukruppa.de ESMTP
Ok, let's test.
# host -t mx pukruppa.de
pukruppa.de mail is handled by 10 mail.pukruppa.de.
# telnet mail.pukruppa.de 25
Trying 217.92.171.227...
telnet: connect to address 217.92.171.227: Connection timed out
There is no SMTP daemon listening for the outside world.
I guess the missing port forwarding ist the problem.
I enabled port forwarding for port 25 in my router - though of course
one never knows, what it really does ...
I guess, it must be a bit more tricky. I just sent myself a mail from
googlemail listening on my Fedora box with:
# tcpdump -n -i any tcp port 25
and instantly receive a lot of activity like
[...]
13:33:56.106134 IP 209.85.212.178.35510 > 192.168.10.1.smtp: Flags [S],
seq 1810379351, win 42900, options [mss 1418,sackOK,TS val 987921454 ecr
0,nop,wscale 7], length 0
13:33:58.105979 IP 209.85.212.178.35510 > 192.168.10.1.smtp: Flags [S],
seq 1810379351, win 42900, options [mss 1418,sackOK,TS val 987923454 ecr
0,nop,wscale 7], length 0
[...]
And 209.85.212.178 seems to be some google machine.
To me this looks as if port forwarding is all-right but Postfix does not
react (?!?)
Peter
--Frank
.
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