Re: [exim] Issue with Exim on an IPv6-only host

On 20/02/2023 14:53, Sebastian Tennant via Exim-users wrote:
> ** […] R=all_via_fast_smtp_server T=fast_smtp_server […]: SMTP error
> from remote mail server after pipelined MAIL FROM:<[…]> SIZE=1537:
> 530 5.7.1 Authentication required DT=1m

You got an SMTP response. You were already talking TLS; the TLS
error basically says that the peer didn't shut it down cleanly
having sent that SMTP response - but that's fine, we got enough.

You didn't authenticate to that peer, and it's insisting that you need to.
--
Cheers,
Jeremy