Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations derfloh on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!

Sendmail - No route to host

Status
Not open for further replies.
matto123

matto123

IS-IT--Management
Joined
Mar 31, 2009
Messages
15
Location
US
On AIX 4.3 setting aspmx.l.google.com as the relay host gives "No route to host". I can ping the host and telnet to that address on port 25, but I cannot telnet to the hostname on port 25.

# ping -c 1 aspmx.l.google.com
PING aspmx.l.google.com: (209.85.225.27): 56 data bytes
64 bytes from 209.85.225.27: icmp_seq=0 ttl=49 time=77 ms
----aspmx.l.google.com PING Statistics----
1 packets transmitted, 1 packets received, 0% packet loss
round-trip min/avg/max = 77/77/77 ms

# telnet 209.85.225.27 25
Trying...
Connected to 209.85.225.27.
Escape character is '^]'.
220 mx.google.com ESMTP v4si3279980icx.53

# telnet aspmx.l.google.com 25
Trying...
telnet: connect: A route to the remote host is not available.
​

I tried to connect to another mailer (telnet mta1171.mail.mud.yahoo.com 25) and that connected.
# telnet mta1171.mail.mud.yahoo.com 25
Trying...
Connected to mta1171.mail.mud.yahoo.com.
Escape character is '^]'.
220 mta1171.mail.mud.yahoo.com ESMTP YSmtp service ready
​

So, we know that the hostname will resolve and that port 25 is not being blocked.
What do I look at next?

Thanks
-MattO
 
Sort by date Sort by votes
Since aspmx.l.google.com does not block incoming SMTP connections (I checked), please see if a local firewall is blocking outbound traffic to dst port 25.
 
Upvote 0 Downvote
The ping command shows that name resolution is working:
# ping -c 1 aspmx.l.google.com
PING aspmx.l.google.com: (209.85.225.27): 56 data bytes​

The telnet command shows that connections to that host on port 25 are allowed (no firewall blocking):
# telnet 209.85.225.27 25
Trying...
Connected to 209.85.225.27.​

This telnet command shows that I can connect using a hostname:
# telnet mta1171.mail.mud.yahoo.com 25
Trying...
Connected to mta1171.mail.mud.yahoo.com.​

So why does telnet aspmx.l.google.com 25 fail on the AIX machine?
- It works from every other machine on my network that I have tried.
 
Upvote 0 Downvote
Something is not healthy with their DNS. The address keeps changing - today it is 74.125.127.26. This host refuses connections on port 25. I would suggest using a different relay.
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

E
  • Locked
  • Question Question
AIX Power5 on 5.3- On varyonvg error "cannot be varied on because no good copies of the descriptor area"
Replies
1
Views
858
JenLM
J
A
  • Locked
  • Question Question
Adding Existing LUN to New LPAR AIX
Replies
0
Views
827
Alvinghost
A
sheilar32
  • Locked
  • Question Question
Migrating from AIX to anything else
Replies
0
Views
722
sheilar32
sheilar32
noobAIX
  • Locked
  • Question Question
How to extend PP on VG ( FREE PPs: 0 (0 megabytes))
Replies
1
Views
623
chgwhat
chgwhat
moudmmm
  • Locked
  • Question Question
Cann't open XManager to AIX
Replies
1
Views
473
unixfreak
unixfreak

Part and Inventory Search

Sponsor

Back
Top