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Thread: Adding additional domain to Zimbra - unable to receive mail to new domain account

  1. #1
    Bonexus is offline Starter Member
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    Default Adding additional domain to Zimbra - unable to receive mail to new domain account

    Hi I hope you can help.
    I am new to using Zimbra but have been very impressed with the system so far.
    I have been asked to add an additional domain to our mail service so have purchased the new domain and our ISP have added MX records etc.
    I created a the new domain (domainb.com) using the Zimbra adminstrator and created a new account with the new domain as the default b.b@domainb.com.

    I have added new A records to our DNS internally mail.domainb.com and this appears to resolve from any machine I try it from.

    If I ping mail.domainb.com from the mail server I get the correct response.
    Strangely if I ping the original mail server name from the mail server mail.domaina.co.uk I get a response of the correct IP (because its the same) but from the new machine/domain alias mail.domainb.com. But I don't see this is a problem because mail is still being routed and received correctly to all the accounts with the original domains addresses domaina.co.uk.

    I am successfully able to send email internally and externally from the new mail/domain account b.b@domainb.com
    But externally sent email to this account does not arrive, and emails sent directly from the same server, but from the original domain (a.a@domaina.co.uk) are immediately bounced with the following error:

    I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

    For further assistance, please send mail to postmaster.

    If you do so, please include this problem report. You can delete your own text from the attached returned message.

    The mail system

    b.b@domainb.com : domainb.com

    I am assuming I have missed a key configuration on the Ubuntu/Zimbra server somewhere telling the server to accept email from domainb.com, despite the Zimbra administrator being used to create the domain and a user using this domain.

    I have looked and this server does not appear to be running bind locally so is either picking up its DNS from the servers internally or more likely our ISP, the name appears to resolve correctly on the mail server.

    Can anyone help with telling me if I have missed something basic in this config?
    Many thanks in advance!

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
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    Default

    Quote Originally Posted by Bonexus View Post
    I have added new A records to our DNS internally mail.domainb.com and this appears to resolve from any machine I try it from.
    You will also need an MX record (you always need an MX record for mail delivery).
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    Bonexus is offline Starter Member
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    Hi, thanks for your reply.
    I did already have MX records configured by our ISP.
    This problem turned out to be due to not having the canonical email address of the new account I had created also added as an alias for the account.
    I had wrongly assumed that because the address was specified in the account (although different to the account name) that would be sufficient. It was not.
    Being new to Zimbra I didn't realise this, but deciding to try and add the alias as had exhausted everything else and was certain the mail delivery should work.
    Well, added the alias and it works!
    Thanks again anyway!

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