Re: Sending to some who has a gmail account.

On Fri, 11 Mar 2022 21:18:40 +0000
Abrolag <[email protected]> wrote:

> On Fri, 11 Mar 2022 21:03:24 +0000
> Brian Morrison <[email protected]> wrote:
> 
> >On Fri, 11 Mar 2022 21:00:08 +0000
> >Abrolag <[email protected]> wrote:
> >  
> >> On Fri, 11 Mar 2022 20:35:40 +0000
> >> Brian Morrison <[email protected]> wrote:
> >>   
> >> >On Fri, 11 Mar 2022 20:07:59 +0000
> >> >Abrolag <[email protected]> wrote:
> >> >    
> >> >> I've just been hit by this for the first time, and frankly have
> >> >> no idea what I'm supposed to do.      
> >> >
> >> >Hit by what?
> >> >    
> >> Message rejected by google
> >>   
> >
> >Without you telling us what the rejection message says it's difficult
> >to know why this is happening. There is a lot going on during an MTA
> >transaction.
> >  
> host gmail-smtp-in.l.google.com [108.177.15.27]
>     SMTP error from remote mail server after end of data:
>     550-5.7.26 This message does not have authentication information
> or fails to 550-5.7.26 pass authentication checks. To best protect
> our users from spam, the 550-5.7.26 message has been blocked. Please
> visit 550-5.7.26
> https://support.google.com/mail/answer/81126#authentication for more
> 550 5.7.26 information.
> u14-20020adfed4e000000b001ef5ac5e851si5283155wro.647 - gsmtp
> 

Is it possible that this email has tripped across Gmail's  'less secure
app access' configuration? Basically, it appears that gmail looks at
the app that is sending the email and/or how the email app is doing
authentication and says that you can allow it, but only for a couple of
months. For example, claws-mail does not conform (at least with my
configuration).