How to send a secured (blast) email to thousands users in php?

Question

If you are going to send emais to 3000++ users. Will you still use php mail function? I heard, it was not secured enough. How do I send a secured blast emails? I dont want t

Answer 1

The nature of e-mail generally means that it is not secure. You can sign your messages with digital signatures or encrypt them with PGP/GPG, but most users won't be able to decrypt them. This is why e-mail form your financial institutions generally contain no sensitive data – even their messages aren't secure.

If your simply looking to ensure that they aren't blocked by spam, you have to setup your mail server with proper SPF records and DomainKeys/SenderID. You could then use some sort of queuing system like PEAR's Mail Queue to send the messages.