FWIW!! Indeed, Safe Mail is an added service available from within your Norton account not in Norton 360 as posted earlier. We are still confused and trying to help determine, how/what Norton may be doing that is causing messages to bounce from the source. Messages bouncing back to you as undeliverable is most likely residing with your provider in some way.
-Is there a reason being given “in the return message” ( non delivery report ) about WHY the bounce occurs? If so please provide that for us.
Here is some information for your review that should be addressed your side: NOTE- Please look for the “spam or other rejection codes” mentioned in the info below.
AI Overview
If your emails hosted through Hosting Heroes are bouncing back in Outlook, you need to check the bounce-back message (Non-Delivery Report) for the exact error code. This code reveals exactly where the breakdown is happening. [1, 2, 3, 4]
Common issues and their fixes include:
- Authentication Issues (SPF/DKIM/DMARC)
If Outlook gives you a 550, 553, or 554 spam/rejection error, your domain’s email authentication records may be missing or misconfigured. [1, 2, 3]
- The Fix: Log into your Hosting Heroes control panel, access your DNS Zone Editor, and ensure your SPF (TXT) and DKIM (TXT or CNAME) records are configured correctly. [1]
- Incorrect SMTP/Outgoing Settings
If emails fail to send and sit stuck in your Outbox, your mail server settings are likely misconfigured. [1]
- The Fix: In Outlook, navigate to your Account Settings and verify the following:
- Outgoing Mail (SMTP): Provided by Hosting Heroes (usually yourdomain.com)
- Port: 587 (with STARTTLS) or 465 (with SSL/TLS)
- Authentication: Ensure “My outgoing server (SMTP) requires authentication” is checked. [1]
- DNS Propagation
If you recently purchased your hosting or changed name servers, email routing might not be fully functional.
- The Fix: Wait 24-48 hours for DNS changes to propagate globally, or contact Hosting Heroes directly at their Hosting Heroes Support Portal to ensure your MX records are pointing to the correct server. [1]
- Mailbox Quota
If you get an error indicating the user is over quota or their mailbox is full (such as a 452 or 552 code), the recipient’s or your own inbox is out of space. [1, 2]
- The Fix: Log into your Hosting Heroes Webmail or Microsoft 365 portal to delete old emails and empty your Trash.
What to do next:
Locate the specific 3-digit error code in the undeliverable email (e.g., 5.1.1, 5.7.1) and submit a support ticket via the Hosting Heroes Client Area for rapid resolution of server-side blocks. [1, 2]
These are the e-mail setting available in Norton:
SA