Linkcheck via Postfix-users:
> I maintain several web sites containing at least one web form. Forms are
> sent to my established postfix server to be turned into properly
> constructed email and sent on. The server is used for many conventional
> emails per day and set up to provide suitable dkim etc. All domains have
> correct SPF, DKIM and DMARC records. No problem with receiving these
> forms at relevant clients' and my own mailboxes.
>
> The forms also send a copy to the sender as confirmation. Most of these,
> as far as I know, get delivered but recently gmail has been rejecting
> them with the message:
gmail rejects all messsages with that sender domain name? Some
messages? I have found that Gmail may treat some 'soft' errors (DNS
timeout) as 'hard' errors. My workaround is to retry deliveries.
/etc/postfix/main.cf:
transport_maps = hash:/etc/postfix/transport
/etc/postfix/transport:
gmail.com google:
gmail.com google:
# List other domains hosted at google...
# Postfix needs the ability to group mail by recipient's MX servers.
# It is becoming urgent.
/etc/postfix/master.cf:
google unix - - - - - smtp
-o soft_bounce=yes
You'd need to monitor your mail queue for messages that are really
undeliverable.
Wietse
> 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 Authentication results:
> 550-5.7.26 DKIM = did not pass
> 550-5.7.26 SPF = did not pass
>
> I have sent a form confirmation to my protonmail account and it passes
> with no problem; spf, dkim and dmarc are all valid/pass.
>
> Anyone know why this could be so, please?
>
> If someone wishes to check this, a typical form (which is sent to me
> with copy to "you") is at
> https://www.linkcheck.co.uk/
> under menu option Contact & Enquiries.
>
>
> _______________________________________________
> Postfix-users mailing list -- [email protected]
> To unsubscribe send an email to [email protected]
>
_______________________________________________
Postfix-users mailing list -- [email protected]
To unsubscribe send an email to [email protected]
