Hi, I was googling to check if there are any howtos to setup smtp-source/smtp-sink to test smtp performance, but there are none and after a quick dig through the man page and another article at postfixmail.com [http://postfixmail.com/blog/?p=218] I figured that out. I am posting the commands here for archives.
# smtp-sink -c 192.168.3.35:25 3 -c Display running counters that are updated whenever an SMTP session ends, a QUIT command is executed, or when "." is received. 192.168.3.35:25 is the ip port where you want smtp-sink to listen. 3 is the backlog. The backlog argument defines the maximum length to which the queue of pending connections for sockfd may grow. If a connection request arrives when the queue is full, the client may receive an error with an indication of ECONNREFUSED I have no idea what would be a nice value for backlog, but this is a required value. so I put 3. Hope others might chime in. -v can show the SMTP conversations. -w delay can insert delay seconds before responding to a DATA command. # time smtp-source -s 40 -l 10120 -m 500 -c -f rajkum...@gmail.com -t f...@example.com 192.168.3.74:25 This example shows 40 parallel sessions (-s 40), almost 10KB sized messages (-l 10120), 500 messages sent (-m 500), counter display (-c), envelope sender and receiver (-f rajkum...@gmail.com -t f...@example.com) and connection on port 25 of 192.168.3.74 (192.168.3.74:25). -N Can prepend a non-repeating sequence number to each recipient address. This avoids the artificial 100% hit rate in the resolve and rewrite client caches and exercises the trivial-rewrite daemon, better approximating Postfix performance under real-life work-loads. -r recipient_count increases the number of reciepients per mail from the default of one. -S subject Send mail with the named subject line (default none) Hope this helps some one searching for it later. raj
