On Mon, 15 Jul 2019 10:34:44 +0000 Andy Smith <a...@strugglers.net> wrote:
> Hi Pierre, > > On Sun, Jul 14, 2019 at 06:17:50PM +0200, Pierre Frenkiel wrote: > > I tried with mail.mailutils, and I get the following error: > > > > << 550-5.7.1 [2a01:e35:8a7f:9c50:2e4d:54ff:fed0:5806] Our system > > has detected that <<< 550-5.7.1 this message does not meet IPv6 > > sending guidelines regarding PTR <<< 550-5.7.1 records and > > authentication. Please review <<< 550-5.7.1 > > https://support.google.com/mail/?p=IPv6AuthError for more > > information > > If sending email to Gmail over IPv6 you absolutely require matching > forward and reverse DNS and some email IP authentication mechanism > such as SPF and/or DKIM. If you can't do this, disable IPv6 in your > mail server either in general or when sending to Gmail (could be > tricky because this affects Google Apps For Your Domain also, so you > don't necessarily know all the domains). > > You will have an easier time over IPv4 as Gmail relax their SPF/DKIM > requirement, though can still avoid unwanted trashing of your email > by implementing SPF and/or DKIM. > They have a damn cheek, as they don't appear to do anything to stop their own customers sending out spam, nor (last time I tried) did they either accept email to 'abuse' or provide any other means to report email abuse by their customers. -- Joe
