550 5.2.0 mail rejete. mail rejected. ofr_506 506

A mail rejection error!

The error message you provided is:

550 5.2.0 mail rejected. ofr_506 506

Let's break it down:

• 550 is the SMTP error code, which indicates a permanent failure.
• 5.2.0 is the specific error code, which is a generic "mail rejected" error.
• ofr_506 is a custom error code or message from the mail server, which might provide more information about the rejection.
• 506 is likely a reference to a specific rule or policy on the mail server that caused the rejection.

Common reasons for a mail rejection with this error code include:

1. SPF (Sender Policy Framework) failure: The mail server's SPF record is not set up correctly, or the sending IP address is not authorized to send emails on behalf of the domain.
2. DKIM (DomainKeys Identified Mail) failure: The mail server's DKIM signature is not valid or is missing, which can indicate a tampered-with email or a misconfigured mail server.
3. Blacklisting: The sending IP address or domain is listed on a blacklist, which can be due to spamming or other malicious activities.
4. Content filtering: The mail server's content filtering rules have blocked the email due to suspicious content, such as spammy keywords or attachments.
5. Authentication issues: The mail server is unable to authenticate the sender's email address or domain.

To resolve this issue, you may need to:

1. Check your SPF and DKIM settings to ensure they are correct and properly configured.
2. Verify that your sending IP address is not listed on any blacklists.
3. Review your email content to ensure it is not triggering any content filtering rules.
4. Check your email authentication settings to ensure they are properly configured.

If you're still having trouble, feel free to provide more details about your email setup and the specific error message you're seeing, and I'll do my best to help you troubleshoot the issue!