发送电子邮件的最佳方式[关闭]

Question

I just started working for a company as a web programmer.

I was assigned to build a web page, which includes a simple form (visitors name, email, and opinion) for sending an email to the website owner.

I am wondering what is the best way to send this email?

• using just HTML form and MAILTO function, or
• should I do validations with JavaScript as well and sending an email using PHP and maybe AJAX?

Answer 1

Using mail()

• mail() is ok, but somewhat unreliable, as it doesn't mean the e-mail has been delivered if mail() returns TRUE.
• If you use mail() ensure you;
  • Multiple extra headers should be separated with a CRLF ( )
  • The body message lines should be separated with a CRLF ( ) and lines should be no longer than 70 characters
  • The subject line complies with RFC 2047

Favoured methods

There are better favoured methods of sending an e-mail, which are more reliable and "flexible" than the vanilla php mail().

• Use a 3rd party (depending on the type of e-mail)
  • Mail Chimp
  • Email Octopus
• Use a library
  • Swift Mailer
  • PHPMailer

Validations

• Ensure you validate ALL user input. If you don't, potentially an attacker could use your mail server to send phishing e-mails to loads of people - making you liable.
  • Validate on the server side as a priority
  • Client-side validation is somewhat optional, as it can be disabled by the client.
• Validate filters
• preg_match()