Question about a few options

I was thinking about entirely going over from the original 2.x exim.conf to spamblocker 4.

So I was looking for things which were present in my 2.x version and not in spamblocker 4 and I was surprised that it were only a few lines.



1.)no_local_from_check

I don't remember why I put that in there every time. I guess because some scripts were causing troubles if this line was not present.



2.) trusted_groups = apache

I'm missing that line in SB 4. I'm using mod_ruid2 and I remember having to put this line in the configuration for webmail to work correctly.

Is that still necessary or can this safely be left out like it is in SB 4?



3.) smtp_max_unknown_commands = 10

I read this on a forum about mail security and that it was a good idea to implement this.

Why is this not in SB 4? Wouldn't it be a good idea to put it in? And if not, why not?

Question about a few options