Email service is not working in my server.

Hey there -

To help combat spam on our platform new Linode accounts have SMTP port restrictions in place on all Linodes by default. Typically, we'll ask you to open a Support ticket to request these filters be removed, but in this case I believe I was able to find your account and take care of that for you.

We ask that you configure rDNS for any Linodes you plan to use for mailing purposes before sending mail if you have not already done so:

Configure Your Linode for Reverse DNS (rDNS)

If you plan on using the Linode for business related mailing now or in the future, do keep in mind that we require business mailing to adhere to the CAN-SPAM act.

Finally, we recommend you review Section 2 ("Abuse") of our Acceptable Use Policy. Terms of Service or AUP violations may result in the reinstatement of SMTP port restriction or account termination.

I hope that helps you out!