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vinit_21

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Hi,
We have a small office of 30 users. Actually we decided to start off our own mail server to have more control over our mails.

We got a ADSL line of 512 KBps and applied for a fixed IP. We configure everything correctly but the problem that I am facing is that I cannot send emails to all the network. Few networks are not accepting emails coming from our domain.

One reason I can think of is reverse lookup as fixed IP which we have recived with our connection is not getting converted to our domain name but instead its getting converted to my ISP host name. Is it possible ?

If somehow I can get my ISP to do reverse lookup of my IP then is anything else I can do so that my emails are accepted by all the companies server.

I do not mind going for relay but my ISP doesnt allow relaying of another domains and have many restrictions. Is there any other site where I can get the service of relaying ?


Thank you.
Waiting for your reply.
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winkelman

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A reverse DNS lookup entry (a PTR record) has to be created in DNS (it's not something that's there automatically). You can check this own www.dnsstuff.com. Enter your fixed IP in the reverse DNS test and see if a domain name comes up.

Secondly, this reported domain name needs to be the same domain that your mailserver is reporting in the SMTP communications. Else, it will still fail.
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vinit_21

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Thanks a lot for replying.

Yeah I understand the importance of Reverse lookup and I am gonna work on it as soon as possible.

Just one last thing,

Is there anything else that needs to be done so that my server gets qualified on all the email servers ?..Maybe registering with some spam filtering company or anything ?.

Just afraid that mails coming out of my server shouldnt get rejected as we use emails intensively in our business.

Thank you once again for replying.
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winkelman

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Nope, nothing more needed.

A correctly configured mail server, a fixed IP address, a properly configured DNS MX record, a properly configured DNS PTR record (reverse DNS) and off you go :)

You cannot get 'on' a spam whitelist or something similar. You just have to make sure you stay 'off' blacklists by keeping your network zombie-free :)
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vinit_21

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Thats answered my question perfectly. Thanks a lot.
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