How to send email to AWS SES from GCP vm instance

Question

I have a requirement where GCP VM instance which is behind a squid proxy and NAT gateway should be able to send emails to AWS SES.

SES: email-smtp.eu-west-1.amazonaws.com

as far as I know, GCP has port 25 blocked and after referring to few articles on stackoverflow, it seems squid does not support SMTP as well.

can someone please help if they have worked on similar thing before?.

Answer 1

Use port 587. As per AWS SES and GCP documentation port 587 is without any restriction. Use HTTP API instead of SMTP protocol. You could allow the regional HTTPS endpoint in the outbound firewall