Error: SMTP Error Could not authenticate

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

The error "SMTP error: could not authenticate" indicates a failure to authenticate with the SMTP (Simple Mail Transfer Protocol) server while attempting to send an email. SMTP authentication is a mechanism used to verify the identity of the sender, typically requiring a username and password. 

What's Causing This Error

  • Inaccurate login credentials supplied by users
  • Overlooking mandatory multi-factor authentication checks
  • User oversight concerning SMTP setting arrangements.

Solution - Here's How To Resolve It

  • Users need to ascertain their employed credentials remain correct.
  • Users ought to guarantee completion of every multi-factor authentication challenge.
  • Users must corroborate the presence of authentic SMTP configurations within their clients containing the following essential components:
  • - Email server address
  • - Designated Transport Layer Security (TLS)/Secure Sockets Layer (SSL) port numbers where relevant

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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