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=== PHPMailer - как включить дебаг откладку ===



 $mail->SMTPDebug = 2; 
 $mail->isSMTP();  // tell the class to use SMTP
 $mail->SMTPAuth   = true;                /
 $mail->Port       = 25;                 
 $mail->Host       = "mail.yourhost.com"; 
 $mail->Username   = "name@yourhost.com"; 
 $mail->Password   = "your password";     

Уровние откладки PHPMailer - от 1 до 4:
 SMTP::DEBUG_OFF (0): Disable debugging (you can also leave this out completely, 0 is the default).
 SMTP::DEBUG_CLIENT (1): Output messages sent by the client.
 SMTP::DEBUG_SERVER (2): as 1, plus responses received from the server (this is the most useful setting).
 SMTP::DEBUG_CONNECTION (3): as 2, plus more information about the initial connection - this level can help diagnose STARTTLS failures.
 SMTP::DEBUG_LOWLEVEL (4): as 3, plus even lower-level information, very verbose, don't use for debugging SMTP, only low-level problems.