Product
Docs
Resources
Log In

Sign Up

Error: SMTP Error 504

What's Causing This Error

This error is similar to a 502 error. If an SMTP command parameter is not implemented in the MTA (Message Transfer Agent) configuration, you may run into this error.

Solution - Here's How To Resolve It

Review the failed request and analyze the SMTP command parameters to resolve the error. Afterward, open the SMTP MTA configuration and configure the MTA to accept the parameter, or try to send the email without using the command causing the error.

Other Common SMTP Errors (and Solutions)

View all errors

Build your first notification in minutes

Send up to 10,000 notifications every month, for free.

Get started for free

Email & push notification

Build your first notification in minutes

Send up to 10,000 notifications every month, for free.

Get started for free

Email & push notification

Product

Pricing

Providers

Developers

Documentation

API

Libraries

Status

© 2023 Courier. All rights reserved.