This may be just cargo culting on my part but when I warm up a new IP for sending mail I first email my mail server from Google, then reply to myself. I do thi

This may be just cargo culting on my part but when I warm up a new IP for sending mail I first email my mail server from Google, then reply to myself. I do this a few times and then they accept my emails without issue provided I am not emailing many people all at once before the IP has good reputation.