Have a red hat linux box. I am able to mail most domain names. Have found 2 domains where I am unable to because I am getting a no route to host error. If I attempt to telnet to port 25 from my machine, I get the same message.

The domain is ourtownusa.net. It is not hosted on this machine, I am trying to just send mail to an address there.

From a seperate box, I am able to telnet to port 25 and send e-mail to them.

I have tried with the firewall off and on (both machines have the same ruleset).

Contacted ourtownusa.net and was told that they have not banned my IP.

This has even confused the ISP that I host this machine with.

Any ideas?
Need more info?

hey thats one really unique problem!!!
well u can try doing a trace route to the domain that u want and the write back with what u get.

see ya and good luck!!!!!!!!!!!!!!!!!!

traceroute to ourtownusa.net (66.140.176.136), 30 hops max, 38 byte packets
1 197.1.22.1 (197.1.22.1) 1.006 ms 0.388 ms 0.383 ms
2 gig000.magic.cybercon.com (216.15.195.37) 0.572 ms 0.491 ms 0.523 ms
3 sl-gw10-kc-2-1.sprintlink.net (160.81.107.9) 16.307 ms 16.215 ms 16.199 ms
4 sl-bb21-kc-14-0.sprintlink.net (144.232.23.73) 16.608 ms 16.516 ms 16.675 ms
5 sl-gw16-kc-0-0.sprintlink.net (144.232.23.70) 16.564 ms 16.412 ms 16.401 ms
6 sl-swb-60-0.sprintlink.net (144.232.128.242) 16.529 ms 16.487 ms 16.640 ms
7 bb1-p3-1.wchtks.sbcglobal.net (151.164.240.146) 20.308 ms 20.253 ms 20.273 ms
8 ded1-fa1-1-0.wchtks.swbell.net (151.164.70.243) 22.084 ms 20.830 ms 20.895 ms
9 Pixius-Comm-IAF1010390.cust-rtr.swbell.net (151.164.71.170) 21.309 ms 21.153 ms 21.033 ms
10 * * *
11 * * *
12 * * *
13 * * *

As you can see, it goes so far then hangs. With the server I am able to send messages to it from, it hangs from hop one.

(knew this before, just forgot to mention).

Seems to be a routing issue..

From work:

markf@markf:~$ /usr/sbin/traceroute ourtownusa.net
traceroute to ourtownusa.net (66.140.176.136), 30 hops max, 38 byte packets
1 firewall (195.200.23.1) 5.452 ms 1.212 ms 0.915 ms
2 router-dmz.cardiff.ftech.net (195.200.15.113) 15.771 ms 17.648 ms 1.716 ms
3 253-41-32-212.cardiff.ftech.net (212.32.41.253) 9.592 ms 11.379 ms 9.389 ms
4 rtr-border-4.telehouse.ftech.net (212.32.16.222) 18.739 ms 8.121 ms 8.250 ms
5 lvl3gw.thn.packetexchange.net (212.187.197.193) 8.802 ms 7.992 ms 8.235 ms
6 pos8-0.core1.London1.Level3.net (212.113.0.114) 14.596 ms 12.304 ms 9.709 ms
7 unknown.Level3.net (212.187.131.150) 15.860 ms 12.170 ms 11.881 ms
8 sl-bb21-lon-6-0.sprintlink.net (213.206.131.21) 14.672 ms 8.194 ms 10.031 ms
9 sl-bb20-msq-10-0.sprintlink.net (144.232.19.69) 79.859 ms 82.032 ms 81.724 ms
10 sl-bb20-rly-15-1.sprintlink.net (144.232.19.94) 88.451 ms 98.281 ms 84.529 ms
11 sl-bb23-rly-9-0.sprintlink.net (144.232.14.118) 86.960 ms 87.666 ms 90.606 ms
12 sl-bb21-rly-9-0.sprintlink.net (144.232.14.133) 88.448 ms 208.381 ms 220.906 ms
13 sl-bb20-atl-10-1.sprintlink.net (144.232.9.198) 115.223 ms 121.810 ms 117.368 ms
14 sl-bb22-fw-10-0.sprintlink.net (144.232.18.21) 115.894 ms 115.833 ms 114.700 ms
15 sl-gw40-fw-9-0.sprintlink.net (144.232.8.250) 117.163 ms 114.308 ms 123.783 ms
16 sl-swb-59-0.sprintlink.net (144.228.39.226) 116.376 ms 116.515 ms 120.121 ms
17 bb2-p3-1.wchtks.sbcglobal.net (151.164.240.142) 137.541 ms 135.494 ms 130.454 ms
18 ded1-fa0-1-0.wchtks.swbell.net (151.164.70.227) 130.497 ms 133.014 ms 133.449 ms
19 Pixius-Comm-IAF1010390.cust-rtr.swbell.net (151.164.71.170) 139.371 ms 138.424 ms 134.503 ms
20 * * *
21 * * *
22 * * *
23 * * *

From home:

Tracing route to ourtownusa.net [66.140.176.136]
over a maximum of 30 hops:

1 <10 ms <10 ms <10 ms 192.168.0.2
2 10 ms 10 ms 10 ms 172.29.71.254
3 10 ms 20 ms 10 ms cdif-t2cam1-b-v106.inet.ntl.com [62.254.254.153]

4 10 ms <10 ms 10 ms cdif-t2core-b-ge-wan61.inet.ntl.com [62.254.253.
161]
5 20 ms 10 ms 10 ms bre-bb-b-so-300-0.inet.ntl.com [213.105.172.49]

6 40 ms 10 ms 10 ms bre-bb-a-ge-730-0.inet.ntl.com [213.105.172.90]

7 20 ms 10 ms 20 ms gfd-bb-b-so-700-0.inet.ntl.com [213.105.172.150]

8 100 ms 100 ms 100 ms vir-bb-b-so-230-0.inet.ntl.com [213.105.173.14]

9 90 ms 90 ms 90 ms mae-atm-east.sbcglobal.net [198.32.187.175]
10 90 ms 90 ms 100 ms bb1-p15-0.hrndva.sbcglobal.net [151.164.243.25]

11 2184 ms 130 ms 170 ms bb2-p11-0.rcsntx.sbcglobal.net [151.164.243.193]

12 1322 ms 1372 ms 281 ms bb2-p13-0.dllstx.sbcglobal.net [151.164.240.210]

13 1312 ms 1342 ms 671 ms bb2-p3-1.wchtks.sbcglobal.net [151.164.240.142]

14 140 ms 180 ms 671 ms ded1-fa0-1-0.wchtks.swbell.net [151.164.70.227]

15 1152 ms 1162 ms 1632 ms Pixius-Comm-IAF1010390.cust-rtr.swbell.net [151.
164.71.170]
16 * * * Request timed out.
17 * * * Request timed out.

Both connections are using different isp's but seem to meet up at the same point at sbcglobal :/

I am still able to send even from the server that it hangs from the first hop. I am assuming that they have a firewall that is not allowing pings.

If you're trying to send mail to them, try to work as a mail server and do
telnet ourtownusa.net smtp
The mail server welcome message should appear. I've tried it and it just hangs. So they are not running mail server (or using an non-standard port) or have a problem with it (maybe too many requests etc), but it's not your fault. COntact their admins again and tell them you can connect their smtp.

They are using port 25. I am able to send them e-mail from one machine and not from another so they are running a mail server.

telnet mail.ourtownusa.net smtp
Trying 66.140.176.131...
telnet: Unable to connect to remote host: No route to host

Above is from problem machine.



telnet mail.ourtownusa.net smtp
Trying 66.140.176.131...
Connected to mail.ourtownusa.net.
Escape character is '^]'.
220 ************************************************2*0*0 *****

This one is from the machine I am able to send mail to them.

For me it looks they're using sophisticated firewall and they allow only connections from certain hosts. Is the machine you can connect them in the same network (behind firewall) with the other one? I suppose it isn't.
I can't connect them, I think I'm right.

I have the same problem with mobile.mycingular.net. I am able to send via the one machine and my regular e-mail client, but am unable to send via the one server. I doubt both have a firewall that only allows connections from a certain host.

I agree. It looks like anti-spam policy.