Experiencing difficulties delivering email to @gmail.com

[Hugo Roy]

Hello,

This might be unrelated to Kolab, but since I'm using my Kolab
instance, I can't send email to people using @gmail.com addresses.

    Reporting-MTA: dns; totosh.ampoliros.net
    X-Postfix-Queue-ID: 17DAB80F95
    X-Postfix-Sender: rfc822; hugo at ampoliros.net
    Arrival-Date: Wed, 23 Oct 2013 11:02:12 +0200 (CEST)
    
    Final-Recipient: rfc822; XXXX at gmail.com
    Original-Recipient: rfc822;XXXX at gmail.com
    Action: failed
    Status: 5.7.1
    Remote-MTA: dns; gmail-smtp-in.l.google.com
    Diagnostic-Code: smtp; 550-5.7.1 [2a01:e35:242d:1bb0:21c:7eff:fe7d:6ab3
        16] Our system has 550-5.7.1 detected that this message does not meet IPv6
        sending guidelines 550-5.7.1 regarding PTR records and authentication.
        Please review 550-5.7.1
        https://support.google.com/mail/?p=ipv6_authentication_error for more 550
        5.7.1 information. h10si3140172wiz.84 - gsmtp

Any idea?

-- 
Hugo Roy | Free Software Foundation Europe, www.fsfe.org  
FSFE Legal Team, Deputy Coordinator, www.fsfe.org/legal  
FSFE French Team, Coordinator, www.fsfe.org/fr/  
 
Support Free Software, sign up! https://fsfe.org/support
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