sendmail - deferred mail - No route to host?

[Knute Johnson]

>"Knute Johnson" <knute at frazmtn.com> writes:
>> I'm running a FC5 box and using sendmail for my mail server.  A 
>> couple of days ago I noticed some mail not leaving and reporting 
>> deferred because of No route to host.  I tried to telnet to these 
>> mail servers and get the same no route to host error.  So it seems 
>> that they are in fact not reachable.  The odd thing is that they 
>> should be busy mail sites.  One of them is my own ISP's mail server.  
>
>Please post the traceroute.  There is no way to tell from the
>information you posted where the problem is.

Wolf:

I should have thought of that!

[root at rabbitbrush knute]# tracert -T -p 25 mx3.sun.com
traceroute to mx3.sun.com (192.18.43.24), 30 hops max, 40 byte 
packets
 1  lonejuniper.frazmtn.com (208.1.40.41)  0.512 ms  0.479 ms  0.283 
ms
 2  ppwire1.frazmtn.com (208.1.40.1)  3.851 ms  4.542 ms  5.286 ms
 3  207.181.15.129 (207.181.15.129)  10.443 ms  12.498 ms  13.131 ms
 4  207.181.15.193 (207.181.15.193)  16.877 ms  17.519 ms  18.124 ms
 5  207.181.15.193 (207.181.15.193)  18.761 ms !X  19.380 ms !X  
27.450 ms !X
[root at rabbitbrush knute]#

This just confirms what I thought and that is that my ISP has blocked 
outbound port 25 again.

Thanks,

-- 
Knute Johnson
Molon Labe...