WampServer

I'm trying to use mail in php to generate and send emails. I'm using settings as for Thunderbird (which sends emails OK) with code:

ini_set('SMTP','mail.overssl.net');
ini_set('smtp_port', '465');

ini_set('sendmail_from','rogerkeeling@f2s.com');

$ok=mail($emailTo,$emailSubject,$fullMessage);

but the mail() function just loops indefinitely.

I can run mail.overssl.net on a browser (Chrome) as webmail, but have to enter a password. I can see no way to enter a password in php.

See the PHP documentation on this subject:
function mail()

Returns true if the mail was successfully accepted for delivery, false otherwise.

It is important to note that just because the mail was accepted for delivery, it does NOT mean the mail will actually reach the intended destination.
It's best to use a class like PHPmailer.

I can't tell you more.

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Documentation Apache - Documentation PHP - Documentation MySQL - Wampserver install files & addons

Thanks. I've found abundant documentation on the topic. My code is:

$emailTo="myname@f2s.com"; #not actual address

$emailSubject="Email Subject";
$fullMessage="email message";

ini_set('SMTP','smtp.gmail.com');
ini_set('smtp_port', '587');
ini_set('sendmail_from','distrlb@gmail.com'); # not actual address

$errorMessage="";
$_SESSION['errorMessage']=$errorMessage;
$ok=mail($emailTo,$emailSubject,$fullMessage);

if ($ok) {
$errorMessage = "email sent";
} else {
$errorMessage = error_get_last()['message'];
}

When run I get 'Must issue a STARTTLS command first' but cannot find how to run STARTTLS. Can I do this preferably using a line of code in PHP

I repeat :

It's best to use a class like PHPmailer. <- this is a link

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Documentation Apache - Documentation PHP - Documentation MySQL - Wampserver install files & addons

Point taken. I'll work on PHPmailer. Thanks.