Setting lmtp_user_concurrency_limit causes anvil permission error

[Tom Sommer]

On 2016-04-07 13:41, Tom Sommer wrote:
> I've set lmtp_user_concurrency_limit to 5 and now LMTP throws this at
> me for every delivery:
> 
> Apr 07 13:38:33 lmtp(4434): Error:
> net_connect_unix(/var/run/dovecot/anvil) failed: Permission denied
> 
> ls -l /var/run/dovecot/anvil
> srw------- 1 root root 0 Apr  7 13:32 /var/run/dovecot/anvil
> 
> If I set lmtp_user_concurrency_limit to 0, the error goes away.

Hrm, if I disable lmtp_rcpt_check_quota, then the error goes away as 
well. Very confusing.