SMTP Error 512

What causes this error and solutions

SuprSend provides APIs and components for you to create notification workflows that drive collaboration & actions from your users - ensuring higher product adoption.

TABLE OF CONTENTS

SMTP Error 512 occurs when the recipient's email domain is not resolvable via a valid DNS record.

What are the cases covered in SMTP Error 512?

SMTP Error 512 in phpmailer Instances & Examples:

  • Case 1: "512 5.1.2 recipient@example.com: Recipient's email domain is not resolvable via DNS."

What’s Causing This SMTP Error 512 In Your Servers? (in pointers)

SMTP 512 error in phpmailer can occur due to:

  • Non-resolvable recipient's email domain: The recipient's email domain lacks a valid DNS record, making it unresolvable.

How to Resolve SMTP Error 512 - Step-by-Step Solution

To resolve this email smtp error 512 in Jenkins servers, follow these steps:

  • Ensure correct spelling of recipient's email domain: It is crucial to ensure that the recipient's email domain is spelled correctly.
  • Check for valid DNS record: Verify that the recipient's email domain has a valid DNS record. Use DNS Lookup to check if the necessary MX records are available for the recipient's mail server to operate.
  • Verify connectivity to resolving the DNS record: If all criteria mentioned above are correct, verify the connectivity to resolving the DNS record from the sender's mail server.

Say Goodbye to all SMTP Errors in Development

SuprSend eliminates the need to build and configure email servers from scratch, ensuring you steer clear of SMTP errors. Here's how SuprSend would work for your application, building a reliable notification system.
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Written by:
Sanjeev Kumar
Engineering, SuprSend

Say Goodbye to all SMTP Errors in Development

SuprSend eliminates the need to build and configure email servers from scratch, ensuring you steer clear of SMTP errors. Here's how SuprSend would work for your application, building a reliable notification system.
Dashboard mockup

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