Oh, well that's fair enough then. Most engineers I know have sold off the goldmine that is historic IP blocks at this point. I'd doubt there is much advantage in using your own at this point though with Google moving to their highly annoying reputation based blocking. So having no email coming from an IP is almost as bad as having spam coming from other IP's in the block. They will "spam folder" email from fresh IP's until enough users "mark as not spam". I've taken to spending an hour or two replying to my own emails and "marking as not spam" if I change IP on an email host and it clears up eventually. Microsoft can randomly block at any time but reporting it here - https://olcsupport.office.com/ generally gets a human in a day or two that manually whitelists the IP. Google and V6 has been a total nightmare as they just randomly hard block for no reason and there is no way to ever have any human fix it (after ensuring all their guidelines are followed) so I've given up trying to use V6 to send email to google. -----Original Message----- From: Mel Beckman <mel@beckman.org> Sent: Wednesday, September 27, 2023 7:51 AM To: Tony Wicks <tony@wicks.co.nz> Cc: Daniel Corbe <daniel@corbe.net>; nanog@nanog.org Subject: Re: SMTP-friendly VPS provider where I can also get a BGP feed Tony, BGP is helpful for email servers if you own your own clean IP space, because much cloud IP space is black listed. -mel via cell