‘Error 455: server unable to accommodate the parameters’ arises when there’s a miscommunication between servers. Specifically, the recipient’s SMTP server encounters difficulties in understanding or processing the parameters related to the “MAIL FROM” or “RCPT TO” commands.
This situation points to an issue on the recipient server’s end, where it might not be properly equipped to handle certain incoming commands from the sending server.
Resolving the Error – Solution
To address this error, it’s recommended to wait for a few hours before attempting to resend the email. This offers a chance for temporary issues to clear up on their own.
If continuous issues arise or if the cause isn’t apparent, we recommend reaching out to the email service provider’s support team as a next step.
That’s it! Now you know the common causes of the 455 error and how to resolve it.
If you’d like to learn how to troubleshoot other common errors, check out the following tutorials: