mail dns help

Posted on 2006-05-04
Last Modified: 2010-03-19
here it goes
i need to add someones subdomain ( to my mail server so that i can send
out mail on their behalf for a job that we are doing (only temporary)
now my question is what do i have to do about reverse pointers reverse dns etc. so that
my mail does not get dropped as spam
this other company wants to point a MX record to my mail server
can somone shed some light on this for me
Question by:dano992
    LVL 26

    Accepted Solution

    "what do i have to do about reverse pointers reverse dns etc. so that my mail does not get dropped as spam"
    Nothing. As long as the ip that your mail server sends mail from has valid reverse dns it doesnt matter what email subdomains you are sending from.

    "this other company wants to point a MX record to my mail server"
    As long as you set your mail server to accept mail for that domain you shouldn't need to change anything else.

    Assisted Solution

    You will need to contact your ISP and have them do a reverse record pointing back to the IP of your mail server....

    I had to do it for a client last week... Only way around it.

    Author Comment

    are you saying that if i
    add my mail server to accept mail from ""
    have them point the MX ("")record to my mailserver
    sent mail out as
    and my reverse pointers say "'
    that all will work withought me doing anything?
    the pointers all say " " nothing about ""
    are you sure?

    Author Comment

    can u have 2 reverse records pointing back to the same IP

    also do i need just reverse pointer ?
    LVL 26

    Expert Comment

    Yes that will work fine. The reverse DNS of the sending server has nothing to do with the FROM domain on the email envelope.
    LVL 26

    Expert Comment

    You CAN have more than 1 PTR record but it is pointless. Nameservers will return them in random order and the first one received is used. To cut down on confusion just stick with 1 PTR per IP.

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