spf and relay

Here my older ISP provided to be so incompetent at so many levels that 
I've finally decided to pick up a new one.

The new one came with a fixed IP...
Now my server at home has a static dns entry as well.

Personally I never had too many problems sending email out, but if I can 
do things more properly, I'd be happy.

What I do is I've a postfix server at home that collect all the emails 
from my lan and relay via sender_dependent_relayhost_map and 
smtp_sasl_password_maps to my [service I use to manage my web space and 
email].
All PCs at home run a local postfix instance that relay on my main 
server at home.

They seems to do a pretty good job to manage my email, they monitor 
incoming and outgoing mail, they take care of the spf record etc...

I was wondering since my MTA is in the chain of delivery and it is 
listed in the "Received:" headers if I should ask that my now fixed ip 
should be added to my spf record or I can do anything else to improve 
the chances my email doesn't get dropped by spam filters.

thanks


-- 
Ivan Sergio Borgonovo
https://www.webthatworks.it https://www.borgonovo.net