Jussi Hirvi schrieb: > Centos 5.x again... > > Is there a way to limit port access on a per-user basis? My practical goal > is to limit, who is allowed to use SMTP AUTH in Sendmail. Any possible > solutions appreciated... > > Obviously, limiting by ip will not work, since the very purpose of SMTP AUTH > is to enable mail relaying for trusted users from *anywhere*. > > - Jussi Pretty simple. If your intention is to define SMTP AUTH usage independent from shell access (i.e. by SSH) - side node: really think about whether it is a good idea to have user logins on your mail server - you should use sasldb as your SASL backend. You have to create the sasldb manually and this way you control who is permitted to relay remotely. Alexander