Unable to send an email using PHPmailer in Drupal 7

Question

My website https://www.smcin.com/ created in drupal 7 and hosted in google cloud console. I am using PHPmailer smtp module to send email through website using port 25. But not mail has been triggered and give error

"test e-mail has NOT been sent to xxxxxxxx@yahoo.com. You should check the logs for error messages."

On logs only this message has been shown:

MESSAGE:    Error sending e-mail (from xxxxxxxx@xxxxxxx.xxx to xxxxxxxx@yahoo.com).
SEVERITY:   error.

I also tried other ports (80, 465, 2525 ) and server (gmail, my official webmail) but nothing work. I wasted lots of time but no solution found.

Answer 1

Your question is unclear as to which Google Cloud Platform service you are using.

Assuming that you're using Compute Engine, please see Sending email from an instance .

NB "Port 25 is always blocked and can't be used"

You should be able to configure it to use eg 465.

You may continue to have challenges in showing a good reputation for your instances' IP addresses.