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Thread: [SOLVED] MailRelay (DynDNS) on Zimbra 6

  1. #1
    Join Date
    Mar 2008
    Rep Power

    Default [SOLVED] MailRelay (DynDNS) on Zimbra 6

    I upgraded from Zimbra 5.0.18 to 6.0.0 (Ubuntu 8.04 32 Bit).

    The 5.0.18 Zimbra configuration was configured last November and worked fine. As I have a dynamic DNS, I use the DynDNS mailhop service. See Outgoing SMTP Authentication - Zimbra :: Wiki

    Since I upgraded to 6.0.0, sending e-mail is no more possible. /var/log/ shows:,[99.999.999.999]:2525, delay=1.1, delays=0.03/0.01/0.96/0.11, dsn=5.0.0, status=bounced (host[99.999.999.999] said: 550 You must authenticate to use MailHop Outbound (in reply to MAIL FROM command))
    The sender receives an error message with the same information. What has changed in 6.0.0?

    I noticed that the postmap command behaves differently:
    echo password > /opt/zimbra/conf/relay_password
    postmap hash:/opt/zimbra/conf/relay_password
    postmap -q /opt/zimbra/conf/relay_password
    postmap -q returns the username and password in 5.0.18 - in 6.0.0 it returns an empty string. This might be a hint why the mail relay as well does not get a username/password causing the 550 error message
    Last edited by mfehr; 09-07-2009 at 01:51 PM.

  2. #2
    Join Date
    Mar 2008
    Rep Power

    Default Postfix configuration was reset during upgrade

    I found the issue. It seems that the postfix configuration was reset during the upgrade from 5.0.18 to 6.0.0

    I checked the configuration of postmap and I found differences between v5 and v6 (Luckily, I run my zimbra server in a VMware instance; I am back on 5.0.18 but am still able to experiment the 6.0.0 upgrade using a different IP address):

    postconf ¦ grep smtp_

    I had to change the following settings to get it working again:

    postconf -e smtp_sasl_security_options=noanonymous
    postconf -e smtp_cname_overrides_servername=no
    postconf -e smtp_sasl_auth_enable=yes
    postconf -e smtp_sasl_password_maps=hash:/opt/zimbra/conf/relay_password

    I checked the /var/log/ to see that the message was successfully delivered.

    BTW: In my initial message, I mixed up the sample with gmail addresses and the dyndns hostnames. Therefore, I did not get a valid info from postmap. Entering the command with the proper information delivers the expected result... - Sorry for potential confusion.

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