When we send mail from PHPList it is showing Send But it is Queued in Mail Server.
Whether the PHP List is directly send mail or it will send to mail server and mail server will send
If the messsges are in the postfix queue then phpList has done its job and you should debug postfix settings.
How does PHPList send email? Check the config file:
// if you have an SMTP server, set it here. Otherwise it will use the normal php mail() function
//# if your SMTP server is called “smtp.mydomain.com” you enter this below like this:
And as samtuke said, if the mails are in the postfix queue, you can check that with: