Lightsail port 25 blocked. 0:00 Introduction 0:21 Remove the port 25 restriction 2:23 Notes 2:56 Closing Subscribe: More Feb 16, 2020 · My application (NOT WordPress) needs to relay emails out to a smarthost (email security system) on smtp port 25. To remove the restriction on port 25, you must submit a request to AWS. You will need to reach out to AWS to lift the restriction. To remove the restriction from a Lambda function, you must attach the function to an Amazon Virtual Private Cloud (Amazon VPC) before you submit the request. When using a Lightsail instance, you may find that port 25 is blocked, which doesn't allow your email to function. To send outbound traffic on port 25, you must submit a request to AWS to remove the restriction. Please refer to Amazon's documentation on how to do this: How do I remove the restriction on port 25 from my Lightsail instance? Dec 2, 2022 · I cannot send emails using the SMTP logins that this "docker-mailserver" provides, because port 25 is blocked on AWS EC2/Lightsail. By default, AWS blocks outbound traffic on port 25 on all Lightsail instances. . That's fine for me - I simply use AWS SES as my SMTP login on Thunderbird and similar. Shubhendu shows you how to remove the restriction on port 25 from your Lightsail instance. Learn how to control inbound traffic to your Amazon Lightsail instances using firewalls and port mappings to enhance security and access management. However, when I tested this port with telnet, I found that this port is blocked. zxhai egcsf hlsl kaqjp usjaqf vasj sfpzgrhnk zkasqi ahv kged