Share via

godaddy microsoft email changes stoped sending email from my backup software status reports

support ajeadvocates 0 Reputation points
2026-06-03T20:59:13.2733333+00:00

godaddy Microsoft email changes stopped sending email for my backup software status reports

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

0 comments

2 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Hani-Ng 11,735 Reputation points Microsoft External Staff Moderator
    2026-06-04T00:35:44.3833333+00:00

    Hi support ajeadvocates

    To better understand your situation, could you please share some information:

    • What error message or logs do you see when the email fails?
    • Are you able to send emails internally and/or externally?
    • Is SMTP authentication currently enabled for the mailbox?
    • Have there been any recent changes to DNS records such as SPF

    I also sent a private message, so please check it at your convenience.

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    Was this answer helpful?

    0 comments

  2. AI answer

    2026-06-03T20:59:28.5233333+00:00

    Changes on the Microsoft 365 side often break email sent from backup software or devices when they use SMTP relay. Typical causes and fixes are:

    1. IP address now blocked or on a blocklist
      • If the backup server sends mail via Microsoft 365/Office 365 SMTP relay, its public IP might be blocked due to suspected spam.
      • Check the public IP of the backup server with a third‑party blocklist checker (for example, MXToolbox).
      • If listed, follow the blocklist provider’s process to remove it.
      • Also check the Microsoft 365 Restricted Users portal as described in Remove blocked users from the Restricted Users portal (linked from the context).
    2. Port 25 or SMTP relay connectivity blocked
      • Some ISPs or network changes block outbound port 25, which breaks SMTP relay from backup software.
      • From the backup server, test SMTP connectivity to Microsoft 365 using Telnet as described in Use Telnet to Test SMTP Communication.
      • If port 25 is blocked and cannot be reopened, reconfigure the backup software to use SMTP client submission (port 587 with authentication) instead of unauthenticated relay.
    3. Connector or SPF not updated after IP change
      • If the backup software uses a Microsoft 365 SMTP relay connector that’s scoped to a specific IP, and the public IP changed (for example, ISP change), mail to external recipients will stop.
      • Update the connector’s allowed IPs and the domain’s SPF record to include the new public IP, following the steps in Option 3: Configure a connector to send mail using Microsoft 365 or Office 365 SMTP relay.
      • After updating, retry sending the backup status report.
    4. TLS / cipher changes between server and Microsoft 365
      • If security hardening was done (for example, disabling older TLS/ciphers as in Sweet32 remediation) and the backup software or its OS only supports deprecated protocols, the TLS handshake to Microsoft 365 can fail and email will not send.
      • Check the backup server’s mail logs for TLS/SSL/STARTTLS or “connection was forcibly closed/authentication failed” errors.
      • If present, update the OS/backup software to support modern TLS, or adjust TLS settings so it can negotiate with Microsoft 365.
    5. General troubleshooting steps
      • Send a simple test email (no attachments) from the backup software to an internal and an external address.
      • If internal works but external fails, focus on connector/SPF/IP issues.
      • If nothing sends, focus on connectivity (port 25/587), TLS, or authentication.

    If the backup software cannot be updated to meet current Microsoft 365 requirements, configure it to send through a local SMTP relay server that is properly configured for Microsoft 365 SMTP relay or client submission.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

    Was this answer helpful?

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.