SMTP>> 250 the.local.host.name Hello [1.2.3.4] [1.2.3.4]
SMTP<< mail from:<a@b>
spool directory space = nnnnnK inodes = nnnnn check_space = 10240K inodes = 100 msg_size = 0
-log directory space = -1K inodes = -1 check_space = 10240K inodes = 100
+log directory space = nnnnnK inodes = nnnnn check_space = 10240K inodes = 100
SMTP>> 250 OK
SMTP<< rcpt to:<c@d>
using ACL "rcpt"