Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

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

Posted on 2007-11-20
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 70

Accepted Solution

Chris Dent earned 500 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.

Featured Post

Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Read this checklist to learn more about the 15 things you should never include in an email signature.
When you’re making plans to join the modern business race, you should analyze various details that may affect your results. Nowadays, millions of businesses are trying to grow into established and appreciated professional enterprises.
In this video we show how to create an Address List in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Organization >> Ad…
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…

861 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question