The successful-logins variable counts the number of times someone has authenticate (using SASL) since the server started. Both IMAP, POP and SMTP authentications are counted.
This variable is not very interesting in and of itself, but its relationship with login-failures is highly interesting. If the percentage of failed logins is unusually high, that often indicates an attack or other problem.
In case of questions, please write to firstname.lastname@example.org.
Last modified: 2010-11-19