Approximately one week ago, we began experiencing issues with our Microsoft Outlook email system. Messages were being unexpectedly removed from user mail folders and placed into quarantine, requiring manual release.
We engaged Microsoft Support, who advised implementing specific transport rules and policies, and verifying that DKIM was correctly configured. DKIM has since been validated and appears to be functioning correctly.
However, the issue persisted. Upon further investigation with Microsoft, we were informed that the URL contained in our email signature was being flagged by Microsoft Defender as potential malware. We removed the URL from all signatures and submitted it to Microsoft Defender for review, which has now been completed and marked as clean.
Despite this, we continue to experience the following problems:
Outgoing emails may not always reach recipients (some recipients report not receiving messages).
Inbound emails from customers are sometimes not delivered to our mailboxes.
There is ongoing uncertainty regarding message delivery and filtering within our Microsoft 365 environment.
We are seeking an experienced Microsoft 365 / Exchange Online / Defender for Office 365 specialist to:
Diagnose and resolve the underlying mail flow and filtering issues.
Review and verify our domain authentication setup (SPF, DKIM, DMARC).
Audit existing mail flow rules, security policies, and quarantine settings.
Ensure that legitimate email traffic (both inbound and outbound) is delivered reliably and not flagged or quarantined incorrectly.
Please include details of your experience with Microsoft 365 mail flow, Defender policies, and domain authentication troubleshooting, along with your proposed approach for identifying and resolving these issues.
Skills Required:
Microsoft 365 / Office 365 Administration
Exchange Online / Outlook Mail Flow Troubleshooting
Microsoft Defender for Office 365 / Security & Compliance
SPF, DKIM, DMARC configuration and troubleshooting
Affiliate Partners for Web Hosting Campaigns Category: Affiliate Marketing, Conversion Rate Optimization, Digital Marketing, Google Adwords, Influencer Marketing, Internet Marketing, Sales, Search Engine Marketing (SEM), Web Development, Web Design Budget: $30 - $250 USD
23-Jan-2026 11:04 GMT
Websites Translation Review Category: Czech Translator, Danish Translator, Finnish Translator, French Translator, German Translator, Italian Translator, Norwegian Translator, Polish Translator, Proofreading, Swedish Translator Budget: €250 - €750 EUR
Site e-commerce panier intégrée Category: CMS, HTML, PHP, Prestashop, SEO, Shopify, Web Development, Web Design, WooCommerce Budget: $10 - $30 USD
23-Jan-2026 11:00 GMT
CNC-Ready Folding Doorstep CAD Category: 3D CAD, 3D Design, 3D Drafting, AutoCAD, CAD / CAM, CNC Machine Retrofitting, CNC Programming, Mechanical Engineering, Product Design, Solidworks Budget: ₹600 - ₹700 INR
23-Jan-2026 11:00 GMT
Poster Promosi Acara Menarik Category: Adobe Illustrator, Photoshop, Graphic Design, Illustration, Logo Design, Poster Design, Visual Design Budget: $250 - $750 USD
23-Jan-2026 10:59 GMT
Amazon Listing Optimization Expert Category: Amazon, Amazon Listings Optimization, Amazon Product Launch, ECommerce, Google Ads, Google Adwords, Internet Marketing, Keyword Research, Product Descriptions, SEO Budget: ₹1500 - ₹12500 INR
23-Jan-2026 10:58 GMT
AI-Generated Video for Bausano's Anniversary Category: After Effects, AI Animation, AI Content Creation, AI Design, AI Rendering, AI Generated Video, Animation, Digital Art, Video Production, Video Services Budget: €8 - €10000 EUR
Lead-Focused Wellness Ad Creatives Category: Adobe Illustrator, Photoshop, Banner Design, Graphic Design, Illustration, Lead Generation, Social Media Marketing Budget: ₹600 - ₹1500 INR
23-Jan-2026 10:56 GMT
Bulk PrestaShop CSV Product Upload Category: AI Content Creation, AI Writing, Data Entry, Data Management, Data Processing, ECommerce, Excel, PHP, Prestashop, SEO Budget: €250 - €750 EUR
23-Jan-2026 10:55 GMT
Business Consultation App MVP Build Category: AngularJS, Flutter, JavaScript, Mobile App Development, Next.js, Node.js, Video Conferencing, WebRTC Budget: $30 - $250 USD
23-Jan-2026 10:54 GMT
Phonk Channel Setup & Management Category: Content Creation, Content Strategy, Digital Marketing, Music Management, SEO, Social Media Management, Video Editing, YouTube Budget: $10 - $30000 USD
