[Dovecot] Confused about what MTA, MDA, IMAP/POP server to use

[Leeman Strout]

Netlink Tech wrote:
> Maybe I am going about this wrong.
> If I don't use virtual users w/mysql, it seems much less complicated for 
> config for dovecot, sendmail/procmail/smtp_auth.
> The only difference then is that I can't have the user at domain1.com 
> <mailto:user at domain1.com> and user at domain2.com <mailto:user at domain2.com> 
> as mailboxes. I would use sendmail/virtusertable to alias 
> user at domain1.com <mailto:user at domain1.com> to the system user user1 and 
> user at domain2.com <mailto:user at domain2.com> to the system user user2.
> Will using the password/shadow/pam auth method be as fast and handle as 
> many users as auth to a mysql db? (i.e. would 10,000 mail users cause a 
> slowdown with system users and not if using mysql?)

 >>>>
>     Questions:
>     1) Recommendations please: How to accomplish with what configuration.
>     2) Quotas?
>     3) SMTP_Auth using Mysql for virtual users? (works fine with
>     PAM/system passwords)
> 
>     Sorry for not being Dovecot specific on the list.
>     Curt

What's wrong with using pam-mysql for all your users and adding in a 
"shell" column to identify those users allowed to shell in?  This would 
also solve your SMTP_Auth question.

I have no idea about quotas.

Leeman