Yes, thanks, it seems that this configuration changed something, but I think there is something else.
Now this particular warning in the dovecot.log disappeared, but it shows these lines instead: Oct 17 10:55:57 imap-login: Error: net_connect_unix(anvil) failed: Resource temporarily unavailable Oct 17 10:55:57 imap-login: Fatal: Couldn't connect to anvil Oct 17 10:56:12 pop3-login: Error: net_connect_unix(anvil) failed: Resource temporarily unavailable Oct 17 10:56:12 pop3-login: Fatal: Couldn't connect to anvil the result is quite the same, I have to reload the dovecot because it does'n accept connections. I tried to add these lines in /etc/dovecot/conf.d/10-master.conf: service anvil { client_limit = 5000 } but without good results. Any ideas? thanks in advance Fabio Ferrari > On 1.10.2012, at 12.15, FABIO FERRARI wrote: > >> Occasionally, it happens that the dovecot.log shows this line: >> master: Warning: service(imap): process_limit reached, client >> connections >> are being dropped > .. >> Then, i edited the file /etc/dovecot/conf.d/10-master.conf and set the >> line >> process_limit = 1500 > > But did you set it inside service imap {}? All of the services have > process_limit parameter. > >