PHPMailer not working since uploading website - php

Question

Since I have uploaded my website to a server I cannot use PHPMailer to send smtp mails. It worked before on my local server (XAMPP). I am using GMAIL so I also changed all the required gmail settings (i.a. I created another OAuth2 token). Nevertheless, it just won't work...
The PHP code I am using (and which is also working offline) is the following:
<?php
/**
* This example shows settings to use when sending via Google's Gmail servers.
*/
//SMTP needs accurate times, and the PHP time zone MUST be set
//This should be done in your php.ini, but this is how to do it if you don't have access to that
date_default_timezone_set('Etc/UTC');
//Load dependencies from composer
//If this causes an error, run 'composer install'
require 'vendor/phpmailer/phpmailer/PHPMailerAutoload.php';
//Load dependencies from composer
//If this causes an error, run 'composer install'
require 'vendor/autoload.php';
//Create a new PHPMailer instance
$mail = new PHPMailerOAuth;
//Tell PHPMailer to use SMTP
$mail->isSMTP();
//Enable SMTP debugging
// 0 = off (for production use)
// 1 = client messages
// 2 = client and server messages
$mail->SMTPDebug = 0;
//Ask for HTML-friendly debug output
$mail->Debugoutput = 'html';
//Set the hostname of the mail server
$mail->Host = 'smtp.gmail.com';
//Set the SMTP port number - 587 for authenticated TLS, a.k.a. RFC4409 SMTP submission
$mail->Port = 587;
//Set the encryption system to use - ssl (deprecated) or tls
$mail->SMTPSecure = 'tls';
//Whether to use SMTP authentication
$mail->SMTPAuth = true;
//Set AuthType
$mail->AuthType = 'XOAUTH2';
//User Email to use for SMTP authentication - Use the same Email used in Google Developer Console
$mail->oauthUserEmail = "mygmail#gmail.com";
//Obtained From Google Developer Console
$mail->oauthClientId = "IWONTTELLU.apps.googleusercontent.com";
//Obtained From Google Developer Console
$mail->oauthClientSecret = "IWONTTELLU";
//Obtained By running get_oauth_token.php after setting up APP in Google Developer Console.
//Set Redirect URI in Developer Console as [https/http]://<yourdomain>/<folder>/get_oauth_token.php
// eg: http://localhost/phpmail/get_oauth_token.php
$mail->oauthRefreshToken = "1/IWONTTELLU";
//Set who the message is to be sent from
//For gmail, this generally needs to be the same as the user you logged in as
$mail->setFrom('mygmail#gmail.com', 'BLA');
//Set who the message is to be sent to
$mail->addAddress('my#privatemail.com', 'Hi');
//Set the subject line
$mail->Subject = 'PHPMailer GMail SMTP test';
//Read an HTML message body from an external file, convert referenced images to embedded,
//convert HTML into a basic plain-text alternative body
$mail->msgHTML(file_get_contents('contents.html'), dirname(__FILE__));
//Replace the plain text body with one created manually
$mail->AltBody = 'This is a plain-text message body';
//Attach an image file
$mail->addAttachment('images/phpmailer_mini.png');
//send the message, check for errors
if (!$mail->send()) {
echo "Mailer Error: " . $mail->ErrorInfo;
} else {
echo "Message sent!";
}
?>
When I try to use it online, it first of all takes very long until I get an error (tried to use gethostbyname('smtp.gmail.com'), too; long story short: didn't work, too) and secondly, the code I get is Error: Failed to connect to server: Connection timed out (110) & SMTP connect() failed. The service I am using is provided by 1and1 (1und1/1&1). I've been trying to fix this for more than 4 hours now and can't find out what is wrong. Less secure apps can access and I also created a token and "created" a refresh token as in https://github.com/PHPMailer/PHPMailer/wiki/Using-Gmail-with-XOAUTH2 . The Troubleshooting guide (https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting) couldn't really help me as well although I think it has problems with authenticating... I have also tried to use ssl (of course I also changed the port etc.) which didn't work either.

Answer 1

Is port 587 still supported by gmail? You might want to you SSL port 465. This article might also be useful https://www.wpsitecare.com/gmail-smtp-settings/ or perhaps 1&1 is being blocked by gmail? See this post http://docs.mailpoet.com/article/61-sending-with-gmail-doesnt-work