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Thread: Bad Planning

  1. #1
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    Default Bad Planning

    Hey everyone.

    Here is the result of bad planning. I am wondering if there is a way to fix this without re-building the entire mailserver.

    The Postfix program

    <ebullock201@comcast.net>: host gateway-s.comcast.net[204.127.202.26] said:
    521-EHLO/HELO from sender 209.91.78.194 does not map to
    webmail.avmax-internal.net in DNS 521-sending machine name must be provided
    as a fully 521-qualified domain via EHLO/HELO command. 521-see section
    4.1.1.1 and 4.1.4 of RFC 2821 521 521: Comcast requires that all mail
    servers must have a PTR record with a valid Reverse DNS entry. Currently
    your mailserver does not fill that requirement. For more information, refer
    to: http://www.comcast.net/help/faq/inde...aq=Email118405 (in reply to
    MAIL FROM command)

    This is because when I built the Zimbra box back in October 2005 as a test/trial, I configured it with an "internal" domain: avmax-internal.net that has no presence on external DNS servers.

    However now that I am in love with Zimbra and am slowly weening my users off of Outlook, I have simply set up "aliase" domains, I.E.: avmax.ca and a few others.

    Any ideas?

    Cheers,

    Travis

  2. #2
    Join Date
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    Default

    Well one solution it so publish a DNS record for that domain. You also could use your ISP to relay mail, since the DNS records should be in place.
    Looking for new beta users -> Co-Founder of Acompli. Previously worked at Zimbra (and Yahoo! & VMware) since 2005.

  3. #3
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    Default

    Other than those two, is there nothing that can be done on the "Zimbra" side? Can I re-run the upgrade procedure and change the default domain at that point? Or will that toast all my users too?

  4. #4
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    Default

    unfortunetly, no.

    They're looking up the information on yoru server that has to be verfied through your DNS. I had the same trouble, and I'm willing to bet you can't send e-mail to AOL either.

    Your best bet is to either host your own DNS, or have the records in place. Most hosting providers make it quite easy to add those record.

    john

  5. #5
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    Default

    There may be a workaround I think. Try to set helo/ehlo in postfix conf. Then your zimbra will helo with the name you set. Of course there will be original name in message headers, but for your purpose it may be sufficient.

    In /opt/zimbra/postfix/conf/main.cf add this line:
    smtp_helo_name = whatever.dns.name.your.need
    and restart zimbra.

    See postfix docs for more. Hope this will help.

    PNE

  6. #6
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    Thanks PNE.

    I made the change and fired an e-mail off. I haven't got a reply yet but I did not get a "undeliverable" message either so at this point I am assuming it is fixed!

    I love easy fixes. I owe you a couple beers for that!

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