I think you can fix this using systemd service. Post Start run script that
adjusts anvil file, in /var/run, chmod to 666.
Zak.
On 2025-09-30 22:02, Felix Geyer via dovecot wrote:
>> I think this bug is back in dovecot 2.4.1.
>> I'm getting:-
>> lmtp(15118): Error: conn unix:/run/dovecot/anvil:
net_connect_unix(/run/dovecot/anvil) failed: Permission denied
>
> I get the same error with Dovecot 2.4.1.
> This is caused by running lmtp as non-root, i.e. with a configuration
like
>
> service lmtp {
> user = vmail
> }
>
> src/lmtp/lmtp-commands.c client_default_cmd_mail() has this code:
>
> /* Connect to anvil before dropping privileges */
> lmtp_anvil_init();
>
> However if I got this right
>
> a) This code is called after dropping privileges, so would not have the
permissions.
> b) It doesn't actually connect to the anvil socket since
lmtp_anvil_init() doesn't call anvil_client_connect()
>
> Adding lmtp_anvil_init(); anvil_client_connect() calls in
src/lmtp/main.c main() before drop_privileges() fixes the error but I
don't know if that's the right approach.
>
> Cheers,
> Felix
>
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