PHPMailer email goes to Spam folder after Authentication Test Passed. What is wrong?
1673
How do you make sure email you send programmatically is not automatically marked as spam?
90053
How do I specify SMTP server for an e-mail in PHP?
56316
How to validate an Email in PHP?
25349
Does PHP's filter_var FILTER_VALIDATE_EMAIL actually work?
40636
Why shouldn't I use PHP's mail() function?
109608
The SMTP server requires a secure connection or the client was not authenticated.
70108
Failed to send HTML mails using PHP mail()
79296
How to validate an email address in PHP
86604
Prevent sent emails treated as junk mails using php mail function
152808
How to Filter Emails Forwarded to Gmail Alias?
135325
PHPMailer v. mail() for a simple Contact Form
100746
Working with a Java Mail Server for Testing
66069
How do I create Test Data for an Org. Wide Email Address?
141141
How does a Reverse DNS lookup work with regards to spam filters?
48901
"The remote certificate is invalid according to the validation procedure." using Gmail SMTP server
89665
PHP: Check who had read sent email?
49281
"Masquerade" mail sender on a multi-domain shared hosting