This. I gave up on Rss2Email and rolled my own version using IMAP instead of SMTP. Deliverability from iffy to 100%. Furthermore, you can pre-select the folder (label).
If you wouldn't mind sharing I'd be interested in seeing/using this. Currently I have a filter in gmail that matches emails that are from myself and have "rss" in them, which paired with a dedicated sendmail listening on my computer (opensmtpd, I'd highly recommend checking it out) has lead to me getting 100%. Your method sounds interesting though!