I'll second Fastmail. They do subdomain addressing, which is cool: https://www.fastmail.help/hc/en-us/articles/360060591053-Plus-addressing-and-subdomain-addres

I'll second Fastmail. They do subdomain addressing, which is cool: https://www.fastmail.help/hc/en-us/articles/360060591053-Plus-addressing-and-subdomain-addressing https://www.fastmail.help/hc/en-us/articles/360060591053-Plu... And they allow arbitrary rules for processing incoming mail, so you can use characters other than the plus sign. And you can also take addresses that have been compromised by spammers and route them right to your spam trainer, so that spammers help improve your defenses.