Hi Axel,
I had this issue, by setting in smtp as well as lmtp transport the OS default tls-ca-bundle path, it resolved it. Apparently either IMAP server or your server set to close connection if fails CV or port 2026 for LMTP is not accessible from SMTP server .
lmtp_transport:
……
tls_verify_certificates = /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem
hosts_require_tls = host_list
smtp_transport:
……..
tls_verify_certificates = /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem
hosts_require_tls = host_list
The solution it might be just with my case. Also, I noticed LMTP server IP must be exposed to internet via port, in your case 2026.
Good luck
Zakaria.
> On 4 Jan 2022, at 16:52, Axel Rau via Exim-dev <exim-dev@???> wrote:
>
> Hi all,
>
> since I upgraded to exim 4.95, I’m getting above error on internal handover from MX relay to IMAP server.
> Transport is LMTP over SMTP
>
> Example log entry:
> 1n4mZW-000G75-9a == some@address <some@address> R=archiveopteryx_user T=archiveopteryx_delivery defer (-18) H=some:ip [some:ip] DT=0s: Remote host closed connection in response to end of data
>
> Transport is
> - - -
> # Delivers mail via LMTP to Archiveopteryx at $OWN_PRODUCTIVE_IMAP_SERVER:2026
> archiveopteryx_delivery:
> driver = smtp
> protocol = lmtp
> hosts = {{ lr_exim_imap_server }}
> port = 2026
> hosts_avoid_tls = {{ lr_exim_imap_server }}
> - - -
>
> IMAP server is archiveopteryx
> https://archiveopteryx.org/
>
> OS is FreeBSD 12.2 p7
>
> Any fix/workaround welcome.
> Axel
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>
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