I have been using a 3rd party Email Service Provider for around 5 years, which has let me have the same email address, reguardless of who my ISP has been. It was understood that the ESP would provide a pop3 server for you, but in order to send email, you needed to use your ISP's smtp server. My current ISP has stopped allowing this, and when I ran Windows I ran a personal SMTP server program. Now that I have switched to Linux, I am in the same boat again, of needing an a personal SMTP server so that I can once again send Email.
What do I need, and how do I set this up? Many thanks for any help.