Most of the cases we are able to send and receive mail without any issue via browser URL access(Webmail), but when try to configure using a mail client we get error like "SMTP server not responding".
It is a simple issue
How to fix it..
First you can check MX record of the domain.
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dig +short domain.com
or
http://mxtoolbox.com/SuperTool.aspx?action=mx%3adomain.com&run=toolpage=====
While configuring the mail, the Incoming and outgoing server should be the same as "MX" record. That will fix the mail sending and receiving issue.
Second step, if the issue is whil configuring.
Need to check the SMTP,POP and IMAP service of the mailserver.
For that follow this.
Suppose mail.domain.com is the MX
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telnet mail.domain.com 25
telnet mail.domain.com 143
telnet mail.domain.com 110
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Need to check if both are okay, if not then check the services status in the server. If both services are running fine, then it must be Firewall issue. You need to open the ports 25 ,143 and 110 in Firewall. It will fix the issue.
Now the issue is fixed.
Common Outlook configurations
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http://myhosting.com/kb/index.php?/article/AA-00564/0/Outlook-Configuration.html=====
