PHP code is sending emails to spam, how to prevent it?
1673
How do you make sure email you send programmatically is not automatically marked as spam?
50034
How can I send an email using PHP?
139180
Why is my e-mail still being picked up as spam? Using mail() function
119345
Minify / Obfuscate PHP Code
152317
Block local (unix) users from sending mail
255
How can I prevent SQL injection in PHP?
34715
PHP email validation function
140528
How to Prevent SPAM without CAPTCHAs or a Centrally managed system (e.g. akismet)
128573
Email mistakenly marked as spam
135325
PHPMailer v. mail() for a simple Contact Form
116615
Good review audit has "possible spam" warning?
142278
Use email to validate post, not unlike craigslist
104130
How to send mail using PHP?
32207
Way to list "Contact Us" email address on web site, yet reduce likelihood of spam?
142774
PHP Mail Encodes Subject Line
97434
^@ spam in tty (but seems to be system-wide)
98119
Add optional box for spam flags letting you say why you think it's spam