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rehashing the smtp greeting question

Discussion in 'E-mail Discussions' started by te2586, Jan 27, 2004.

  1. te2586

    te2586 Member

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    I've read through the posts on this subject and have some questions:

    I've set up a client on a unique IP address and had the reverse record changed so that the PTR record has the same name as the A record. According to the posts here, that should change the hostname that shows up in the smtp greeting. However, it doesn't. I have a client who is all up in arms about the yellow warning on DNS reports about this...if there is no way to change this at all, I'll just tell my client that. But if there is something I've overlooked to set this up, please let me know!

    Thanks in advance!
     
  2. ciphervendor

    ciphervendor Well-Known Member

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    There is no way to change the hostname for each client. Since Exim uses the eth0 on your box, it will use the machines hostname not reverse DNS for an IP on your box. The yellow thing at dnsreports is a warning not and error--mail will still flow without issue.

    If the client is really concerned, sell them a dedicated box ;)
     
  3. netwrkr

    netwrkr Well-Known Member

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    Another option would be to remove the hostname from the smtp banner.

    TP
     
  4. ciphervendor

    ciphervendor Well-Known Member

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    Not exactly a good idea.
     
  5. netwrkr

    netwrkr Well-Known Member

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    How informative! Why?
     
  6. netwrkr

    netwrkr Well-Known Member

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    I might suggest you go read RFC 2821. Specifically the section on Session Initiation. The hostname is not required.
     
  7. ciphervendor

    ciphervendor Well-Known Member

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    I'm fairly certain I didn't say it was against RFC. Many mail servers *require* a hostname in the smtp banner. No hostname, no mail delivery.
     
  8. netwrkr

    netwrkr Well-Known Member

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    When then I guess the many hosts using a device such as a Cisco PIX with mailguard enabled aren't receiving mail.

    PIX banner:
    220 *****************************************************2******2**********0 ****200*****2******0*00


    Having setup many networks with the PIX in the past 4 years I can assure you there has -never- been an instance where a user was unable to receive email because of the banner presented by the PIX.

    TP
     
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