One of the worst ideas. Every big email provider (gmail, yahoo, outlook ...) do block every mail sent from a home isp. so you will not be able to send anyone a mail.
Hi tpetry - Giri Sreenivas, co-founder and CEO of Helm here. You raise an important issue with residential IP addresses not being trusted by email senders. This is why we use a static IP address assigned to a gateway for each customer. The Helm Server appears to have this IP when communicating with other email servers. This also allows us to define reverse DNS for a domain which is another marker of trust for email servers.
Very ignorant response. It's fairly straightforward to set up SPF for a new domain, and most big emails will follow these policies.
SPF won't help if the spam filter blocks residential addresses outright, which is commonly done using DNSBLs.