FastMail

Pros:

  • Good interface
  • Open source technologies
  • Standard IMAP
  • Aliases
  • Security
  • Rock solid search

Cons:

  • The customized spam folders need 200 false positive and 200 false negative to fire up. Depending on the amount of emails you receive, it can take months (or even years!) to have it…
  • If you use email redirections, their anti-spam is basically useless
  • Support is meh, very slow

Settings

https://www.fastmail.com/help/technical/servernamesandports.html?u=3661409d#email

iOS app

  • Basically, a web view of fastmail.com. It works, but it’s not that enjoyable, especially as a main app.
  • Brings to iOS all the features of the browser client, which is a good thing