When you encounter SMTP error 510, it means your email cannot be delivered because the recipient's mailbox is full or unavailable. This permanent error (5xx) signifies the recipient's server can't accept your message. This error can occur in applications like phpmailer and jenkins when sending emails.

What are the cases covered in SMTP Error 510?

Common scenarios triggering SMTP Error 510:

1. Mailbox Overload: The recipient's mailbox has reached its storage limit and cannot accommodate new emails (phpmailer, jenkins).
2. Suspended Account: The recipient's email account has been temporarily or permanently disabled, making it inaccessible (jenkins).
3. Email Routing Issues: Problems with email routing or domain configuration prevent delivery to the recipient's server (smtp-error-510).

What’s Causing This SMTP Error 510 In Your Servers?

Potential causes of SMTP Error 510:

• Recipient Mailbox Full: The recipient's mailbox has exceeded its storage quota, leaving no space for your email (phpmailer, jenkins).
• Suspended Recipient Account: The recipient's email account is temporarily or permanently suspended, blocking email reception (jenkins).
• Email Routing or Domain Issues: Problems with email routing or domain configuration hinder delivery to the recipient's server (smtp-error-510).

How to Resolve SMTP Error 510 - Step-by-Step Solution

Resolving SMTP Error 510:

1. Contact the Recipient: Inform the recipient about the error and suggest actions like clearing mailbox space, reactivating their account, or addressing any access issues (phpmailer, jenkins).
2. Verify Recipient Mailbox Status: Check if the recipient's mailbox is indeed full or their account is suspended. If suspended, they need to contact their email provider (phpmailer, jenkins).
3. Investigate Routing or Domain Issues: If the error seems related to routing or domain configuration, contact the recipient's email administrator or hosting provider for assistance (smtp-error-510).