Making Sense of ExchangeDefender SMTP Alerts | ExchangeDefender [ Skip to content ](#main) [ ![ExchangeDefender](/assets/images/xd_logo_blue.png) ](/) Email Security ![Platform Overview](/assets/images/m-xd-pro.png)### ExchangeDefender PRO Enterprise-grade email security made simple for every business. 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There were many partners who forgot they had the feature enabled, and for the first time, received alerts about issues connecting to their clients. My biggest fear when re-enabling the alerts was possibly upsetting partners with emails that they may consider useless or something they “don’t” want. Surprisingly, the response from every partner I spoke with since enabling the feature was positive and I heard many partners say “We’ve been waiting for this.” [![Alert-Icon](http://www.exchangedefender.com/blog/media/Making-sense-of-ExchangeDefender-SMTP-al_8295/Alert-Icon_thumb.png)](http://www.exchangedefender.com/blog/media/Making-sense-of-ExchangeDefender-SMTP-al_8295/Alert-Icon.png)Throughout last week and yesterday I’ve made minor modifications to the alerts to include more verbosity and to have threshold values for failures. Now, alerts will wait for three consecutive failures before sending an alert to the partner. Alerts will only be sent once per hour for consecutive failures. Once the connection error is cleared, the admin email on file for the domain will receive an “up” email. Now, alerts will contain more helpful, verbose information. For example, here is an alert about backpressure ExchangeDefender had trouble communicating with the MTA (xx.xx.xx.xx) for domain.com MTA Experiencing Backpressure To resolve this, please review the following articles: > **Exchange 2010:** [**http://technet.microsoft.com/en-us/library/bb201658.aspx**](http://technet.microsoft.com/en-us/library/bb201658.aspx) > > **Exchange 2007:** [**http://technet.microsoft.com/en-us/library/bb201658(v=exchg.80).aspx**](http://technet.microsoft.com/en-us/library/bb201658(v=exchg.80).aspx) And here is an alert about the SMTP connector rejecting emails because authentication is required **MTA Rejected Mail From Command. It is possible that anonymous relay is not enabled for the SMTP connector and that authentication is required.** Currently the alerting system will alert for: > \- Incorrect IP restrictions (MTA answers, but rejects the connection because the IP restrictions do not allow ExchangeDefender) > > -SMTP Authentication Required, not allowing anonymous relay > > -Exchange experiencing Backpressure > > -Connection failed / timed out The next upgrades will save the SMTP test debug output to SQL to allow partners to review the SMTP transaction logs and allow partners to control the threshold values for failures. Travis Sheldon VP, Network Operations, ExchangeDefender (877) 546-0316 x757 [ Previous post Memorial Day Promotion!!! May 22, 2012 ](https://www-preview.exchangedefender.com/blog/2012/05/memorial-day-promotion) [ Next post Quarantine vs. Search May 24, 2012 ](https://www-preview.exchangedefender.com/blog/2012/05/quarantine-vs-search) Related Posts ------------- [ 1 May ](https://www-preview.exchangedefender.com/blog/2026/05/exchangedefender-new-ui-is-live)### [ExchangeDefender New UI is Live](https://www-preview.exchangedefender.com/blog/2026/05/exchangedefender-new-ui-is-live) [Read more: ExchangeDefender New UI is Live](https://www-preview.exchangedefender.com/blog/2026/05/exchangedefender-new-ui-is-live) [ ![](https://storage.services.exchangedefender.network/exchangedefender-blog/blog/2025/12/christmas-1.jpg) 25 Dec ](https://www-preview.exchangedefender.com/blog/2025/12/merry-christmas)### [Merry Christmas](https://www-preview.exchangedefender.com/blog/2025/12/merry-christmas) [Read more: Merry Christmas](https://www-preview.exchangedefender.com/blog/2025/12/merry-christmas) [ ![](https://storage.services.exchangedefender.network/exchangedefender-blog/blog/2025/11/Website-Screenshots-2025-4.jpg) 4 Nov ](https://www-preview.exchangedefender.com/blog/2025/11/why-iot-devices-are-a-hidden-security-risk-for-your-business)### [Why IoT Devices Are a Hidden Security Risk for Your Business](https://www-preview.exchangedefender.com/blog/2025/11/why-iot-devices-are-a-hidden-security-risk-for-your-business) [Read more: Why IoT Devices Are a Hidden Security Risk for Your Business](https://www-preview.exchangedefender.com/blog/2025/11/why-iot-devices-are-a-hidden-security-risk-for-your-business) Search the blog Search Recent Posts ------------ - [ExchangeDefender New UI is Live](https://www-preview.exchangedefender.com/blog/2026/05/exchangedefender-new-ui-is-live) - [Announcing ExchangeDefender 10](https://www-preview.exchangedefender.com/blog/2026/04/announcing-exchangedefender-10) - [Merry Christmas](https://www-preview.exchangedefender.com/blog/2025/12/merry-christmas) - [Why IoT Devices Are a Hidden Security Risk for Your Business](https://www-preview.exchangedefender.com/blog/2025/11/why-iot-devices-are-a-hidden-security-risk-for-your-business) - [Top 5 IT Problems Small Businesses Face in 2025 — and How to Fix Them](https://www-preview.exchangedefender.com/blog/2025/10/top-5-it-problems-small-businesses-face-in-2025-and-how-to-fix-them) Categories ---------- - [Archiving](https://www-preview.exchangedefender.com/blog?category=archiving) (21) - [Business Continuity](https://www-preview.exchangedefender.com/blog?category=business-continuity) (13) - [Compliance](https://www-preview.exchangedefender.com/blog?category=compliance) (8) - [ExchangeDefender](https://www-preview.exchangedefender.com/blog?category=exchangedefender) (349) - [General](https://www-preview.exchangedefender.com/blog?category=uncategorized) (590) - [Hosted Services](https://www-preview.exchangedefender.com/blog?category=hosted-services) (86) - [Industry News](https://www-preview.exchangedefender.com/blog?category=industrynews) (29) - [Marketing](https://www-preview.exchangedefender.com/blog?category=marketing) (18) - [Phishing](https://www-preview.exchangedefender.com/blog?category=phishing) (5) - [PRO TIPS](https://www-preview.exchangedefender.com/blog?category=pro-tips) (44) - [Product Features](https://www-preview.exchangedefender.com/blog?category=product-features) (54) - [Security](https://www-preview.exchangedefender.com/blog?category=security) (65) - [Shockey Monkey](https://www-preview.exchangedefender.com/blog?category=shockey-monkey) (22) - [Spamfilter](https://www-preview.exchangedefender.com/blog?category=spamfilter) (5) - [Support](https://www-preview.exchangedefender.com/blog?category=support) (45) - [Webinars](https://www-preview.exchangedefender.com/blog?category=webinars) (44) Solutions --------- - [Stop Spam & Malware](/email-security) - [Hands-Free Email Backup](/livearchive-backup) - [Instant Email Recovery](/inbox) - [Send Private Emails](/corporate-email-encryption) - [Train Against Email Threats](/spearphishing) - [Share Files Safely](/web-file-server) Company ------- - [About ExchangeDefender](/about-us) - [Compliance & Legal](/our-compliance) - [Become a Partner](/partners) - [Support Portal Login](https://support.exchangedefender.com/) - [Microsoft 365 Email Management](/managed-email-operations) - [AI Advisory Service](/management-ai) ![ExchangeDefender](/assets/images/dark-xd-logo.png)USA: +1 (407) 465-6800 United Kingdom: 0800 8620149 Australia: +61 0390010641 Fax: +1 (954) 839-8737 [ ](https://www.facebook.com/ExchangeDefender) [ ](https://www.twitter.com/XD_Defender) [ ](https://www.linkedin.com/company/exchangdefender) [ ](/blog) © 2026 Own Web Now Corp - All rights reserved </> with ❤️ in Orlando [SLA](/sla) [TOS](/tos) [PRIVACY](/privacy-end-users) [AUP](/aup) We're Here to Help 👋 -------------------- Tired of AI 🤖 and hold music? 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