Problem in SMTP

Is your ISP blocking port 25?

If so there is a tweak in WHM that will open port 26 for alternate use with this issue in mind.

Service Configuration >> Service Manager
exim on another port.
Run another copy of exim on port 26.
Useful for providers that block port 25.
Check both boxes.

 

onh1986,

Try to disable any Firewall or Antvirus on your machine and try to send the emails again else contact your hosting company.

 

If your mailserver name is correct, then it's most likely being blocked by your ISP. You can check this by trying to telnet to your mailserver on port 25. If you can do that, the problem is elsewhere.

If that is the case, and you have WHM access, the advice above to run another copy of your mailserver on a different port is correct.

If you just have cPanel access, ask your host if they can provide the alternate port for smtp.

In either case, once you have the new smtp port number, you'll have to also configure Outlook Express to use that port. This can be done in the advanced settings of your email account server information.

 

Use your ISP's email SMTP settings (the Internet Service Provider you connect to the internet by) not your website settings until you find what the problem is.

Then you can contact your hosting provider who may be able to fix it.

Also Send an email to your ISP and ask them if they allow you to use port 25 or if they have blocked it.


Edit:
I have just checked your domain onh1986.com at http://dnsreport.com and you are hosting with Yahoo who have some major errors with your DNS zone.
Do as I suggested above by using your ISP email settings and write to Yahoo Hosting and ask them to fix your problem.

 

Also make sure that you have checked "My Server Requires Authentocations" in your mail Accounts properties of your Outlook

 

If you don't have the root access to the server, you better ask your Hosting company to assist you in this matter. Also please once again confirm with your Internet Service Provider, whether they have blocked the SMTP port 25.

 

There seems to be an echo in here :D

 

Use your ip-adresses of the mail server for email SMTP settings.
DNS-resolving problem !

 

Well I think I got this sorted :
there is no MX record in your DNS, check this out :

http://www.dnsstuff.com/tools/lookup.ch?name=mail.onh1986.com&type=MX

 

I believe the mx record is not important for the error message.

Maybe furthermore a probelm with not correct installed eMail profile , shared ie-connection or firewall.
Reinstall your eMail profile on your maschine !