I'm running debian 7.7 and I've used "the perfect server" tutorial to set up the server (with apache). My problem is that monit is constantly (it's 3-5 times a day) giving me alerts like this: Code: Connection failed Service amavisd Date: Wed, 29 Oct 2014 12:41:22 Action: restart Host: jaom.pl Description: failed protocol test [SMTP] at INET[localhost:10024] via TCP -- SMTP: error receiving data -- Resource temporarily unavailable Your faithful employee, Monit usually followed by another mail informing that connection succeeded. This is mostly about amavisd however sometimes I'm also given same note regarding sshd. First I was sure this was resource issue on the server, so I've moved from 1 core and 1GB RAM to 2 cores with 2GB of RAM (my VPS is in fact an OpenVZ container). However, little did it help.