With shared domains, Purelymail should work out of the box on modern mail apps, using default settings. Just enter your email address and your password, and make sure to use SSL or STARTTLS for security.
In case it doesn't or if you're using a custom domain, here you can find explicit configurations.
You probably want to use IMAP for viewing your mail.
Our imap servers can be found at imap.purelymail.com with port 993. Make sure your app connects with SSL/TLS.
SMTP takes care of delivering your messages. Use smtp.purelymail.com with port 587. For security, make sure your app uses STARTTLS.
Make sure you really need POP3 before using it! POP3 usually deletes messages from our servers after you download them. It can be found at: pop3.purelymail.com with port 995. Make sure your app connects with SSL/TLS.
If you'd like to configure filters via Sieve, a ManageSieve implementation is available at mailserver.purelymail.com with port 4190. Use STARTTLS.
Note that you can also configure Sieve filters in webmail.