email list for marketing?

[Tomy]

What is the best way to build an email list for marketing?

[Cutie]

There are risks to using STARTTLS, for example, if the mail server was compromised while the encryption was turned on it would make it difficult for sys admins to monitor and manage mails arriving to a domain. The main advantages of starttls vs tls are customers' peace of mind that their data will be more secure when traveling through servers.