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Quick question regarding how email works

Discussion in 'E-mail Discussions' started by josesan311, Jul 12, 2008.

  1. josesan311

    josesan311 Active Member

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    Hello,

    Im currenly using 4 cPanel servers (server.domain.com, server.domain2.com, server.domain3.com server.domain4.com) to load balance an email application that send mails to a lot of my customers (autoresponder plus) and im not sure how should i configure the rDNS on each server.
    Im currently sending emails from support@domain.com. What i did is i transferred the same cPanel account (domain.com) to the rest of all the servers included mailbox support@domain.com so when the program logins to each of the 4 smtp servers previously mentioned the software sends the emails from the user support@domain.com.
    My question is, should i need to setup the rDNS on every main server IP to the same record? I mean setup the rDNS to point domain.com. Or should i setup the rDNS to point each server domain? Ex. setup main server ip of server.domain2.com rDNS to domain2.com and NOT domain.com.

    I hope i have been clear and you guys could understand this situation.

    Thank you for wasting the time to read this post. I will really appreciate any suggestion you can advice.

    Thank you in advance!

    Cheers.
     
  2. josesan311

    josesan311 Active Member

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    Can someone shred me some light on this please.

    Thank you.
     
  3. sparek-3

    sparek-3 Well-Known Member

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    My understanding of how most mail servers recognize reverse DNS is that an IP address needs to resolve to a hostname. In turn that hostname needs to resolve back to that IP address.

    So in essence you would have something like:

    192.168.0.1 resolves to host.domain.com
    host.domain.com resolves to 192.168.0.1

    It doesn't really matter if the envelope-sender of the message is an @domain.com or @host.domain.com e-mail address.
     
  4. josesan311

    josesan311 Active Member

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    Thank you for clarifying me this out.

    Regards.
     
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