I am unable to figure out how to implement outgoing security (authentication) on my ISP SMTP server which I want to use to relay all my mail
With 6.01 you have no luck (at least not with legally available solutions), but with 6.5 RC1 you can use the SMTP Proxy:
Quoting Charlie Brady:
The e-smith-email RPM included in 6.5beta1 includes an
an SMTP authentication proxy. The server can be configured so that qmail uses this proxy for all outgoing SMTP connections. Mitel made this software available in e-smith-email-4.15.1-06 in the devel directory on the various mirrors, and Shad has picked that version up as the basis for his work on 6.5.
Because qmail has not been modified in any way, there's no legal restriction on distribution of this solution.
As I understand it, there is no panel support for this feature. To enable it from the command line, do:
config setprop smtp-auth-proxy status enabled
config setprop smtp-auth-proxy Userid aaaaa
config setprop smtp-auth-proxy Passwd xxxxxxxxx
config set SMTPSmartHost smtp.your.isp
signal-event email-update
--------------
I tried that with 6.01 and some new RPMs with no luck, but with 6.5 it worked perfectly.