For your phpList system to be able to deliver emails, you need to set up a way for it to send.

There are three different ways to send email.

To send using SMTP, the minimum setting is PHPMAILERHOST which you need to set to your SMTP hostname. To use a different port than the default port 25, set PHPMAILERPORT

You can also use SMTP-Authentication, by setting phpmailer_smtpuser and phpmailer_smtppassword

To use multiple SMTP servers, you can set the PHPMAILERHOST to be a semi-colon delimited list of servers. For example

define('PHPMAILERHOST','smtp1.domain.com;smtp2.domain.com');

and it can also contain ports, for example

define('PHPMAILERHOST','smtp1.domain.com:26;smtp2.domain.com:27');

To use a different SMTP server for testing or processing the queue, you can set

PHPMAILERTESTHOST and PHPMAILERTESTPORT

or alternatively

PHPMAILERBLASTHOST and PHPMAILERBLASTPORT

both of which have the same options as PHPMAILERHOST and will default to the value of PHPMAILERHOST if not defined.

To use a username and password for SMTP authentication set the following in your config file:

$phpmailer_smtpuser = 'smtpuser';
$phpmailer_smtppassword = 'smtppassword';

If PHPMAILERHOST is not set or empty, the default PHP mail command will be used. Sending mail will then depend on your PHP installation.

To send using Amazon SES, set the following config values for

AWS_ACCESSKEYID and AWS_SECRETKEY

Also, make sure to set PHPMAILERHOST to be empty.