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Can telnet to my outgoing smtp server 50% of the time - DNS Issue?

Posted on 2007-11-20
Medium Priority
Last Modified: 2013-11-30
Hello Experts,

I have a client who uses POP3 for their email accounts on (3) different laptops with Outlook 2007.

We have noticed that when they try to use their laptops outside of the office that sometimes the email sends out and sometimes it does not.

I have tried to telnet to the outgoing smtp server on port 25 from 4 different internet connections and 2 connected and 2 do not connect.

Is this a DNS issue with the mail sever?

Please try for yourself, can you connect to telnet mailhost.equipfix.com 25   ?

Not sure how to proceed, the outgoing mailserver is not mine, it is in another state and I am not the admin.



Question by:Lasareath
LVL 71

Accepted Solution

Chris Dent earned 2000 total points
ID: 20319573

Hi Lasareath,

DNS is nice and easy to check. On the clients that fail to connect run:

nslookup mailhost.equipfix.com

There are no problems with DNS that I can find. If it resolves the name then you should run a Tracert to mailhost:

tracert mailhost.equipfix.com


Author Comment

ID: 20321436
Here's what I get:

nslookup mailhost.equipfix.com
Server:  g2-fs2.domain.g2.local

Name:    mailhost.equipfix.com

Tracing route to mailhost.equipfix.com []
over a maximum of 30 hops:
  1     1 ms     2 ms     1 ms
  2    24 ms    26 ms    23 ms  L213.DSL-RTR13.NY325.verizon-gni.net []
  3    31 ms    24 ms    39 ms  at-3-2-0-1734.CORE-RTR1.NY325.verizon-gni.net []
  4    23 ms    24 ms    26 ms
  5    25 ms    24 ms    25 ms  0.so-4-3-0.XL3.NYC4.ALTER.NET []
  6    28 ms    24 ms    26 ms  0.ge-6-0-0.BR3.NYC4.ALTER.NET []
  7    26 ms    24 ms    25 ms []
  8    25 ms    24 ms    24 ms  p5-0-0.rar2.nyc-ny.us.xo.net []
  9    32 ms    32 ms    32 ms  p6-0-0.rar1.washington-dc.us.xo.net []
 10    32 ms    32 ms    37 ms  p0-0-0d0.rar2.washington-dc.us.xo.net []
 11    47 ms    46 ms    45 ms  p6-0-0.rar2.atlanta-ga.us.xo.net []
 12    78 ms    79 ms    78 ms  p4-1-0.rar2.miami-fl.us.xo.net []
 13    83 ms    83 ms    83 ms  p4-0-0.mar2.tampa-fl.us.xo.net []
 14    90 ms    86 ms    84 ms  ge13-0.clr2.tampa-fl.us.xo.net []
 15   113 ms   190 ms   239 ms  ip65-47-32-58.z32-47-65.customer.algx.net []
 16   265 ms   172 ms   239 ms  mailhost.equipfix.com []
Trace complete.

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