Regards
Alexander

Alexander Neilson
Neilson Productions Limited
021 329 681
alexan...@neilson.net.nz

> On 25/01/2024, at 16:56, Grant Taylor via mailop <mailop@mailop.org> wrote:
> 
> Hi,
> 
> I knew that Google was going to start requiring SPF or DKIM (in addition to 
> other sender guidelines [1].  But I thought they were starting February 1st, 
> per their own sender guidelines.
> 
> I saw a bounce from a system (cron job output) trying to send directly to 
> gmail.com, no forwarding involved.

Was this over v6? Haven’t they required this on v6 for a while so this may just 
be that. 

> 
>   <<< 550-5.7.26 This mail has been blocked because the sender is 
> unauthenticated.
>   <<< 550-5.7.26 Gmail requires all senders to authenticate with either SPF 
> or DKIM.
>   <<< 550-5.7.26
>   <<< 550-5.7.26  Authentication results:
>   <<< 550-5.7.26  DKIM = did not pass
>   <<< 550-5.7.26  SPF [redacted.example.net] with ip: [192.0.2.1] = did not 
> pass
>   <<< 550-5.7.26
>   <<< 550-5.7.26  For instructions on setting up authentication, go to
>   <<< 550 5.7.26 https://support.google.com/mail/answer/81126#authentication 
> d20-20020a05683025d400b006dc5452f468si4641458otu.190 - gsmtp
>   554 5.0.0 Service unavailable
> 
> Am I missing something obvious or has Google started implementing this new 
> requirement ahead of their published schedule?
> 
> The only surprise to me is that this happened ~8 days before the published 
> February 1st date.
> 
> [1] 
> https://support.google.com/a/answer/81126#zippy=%2Crequirements-for-all-senders
> 
> 
> 
> --
> Grant. . . .
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