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
Transport rules and mail flow policies
Email deliverability analysis and troubleshooting.
AI CTF Solver Category: AI Agents, AI Chatbot Development, AI Development, AI Model Development, AI Research, Algorithm, Engineering, Machine Learning (ML), Mathematics, Matlab And Mathematica Budget: £250 - £750 GBP
Remote Part-Time Call Support Category: Admin Support, Communications, Copy Editing, Copy Typing, Copywriting, Data Entry, Email Handling, Phone Support, Time Management, Virtual Assistant Budget: ₹100 - ₹400 INR
19-Apr-2026 04:02 GMT
Digital Marketing Strategist for Lead Generation Category: Content Marketing, Digital Marketing, Google Adwords, Internet Marketing, Lead Generation, SEO, Social Media Marketing, YouTube Budget: $250 - $750 USD
19-Apr-2026 04:02 GMT
Admin Layanan Pelanggan Media Sosial -- 2 Category: Content Creation, Customer Service, Customer Support, Data Analysis, Email Marketing, Social Media Management, Telemarketing Budget: $2 - $8 USD
19-Apr-2026 04:00 GMT
Unique Content Creation for Dog Training Website Category: AI Content Creation, AI Writing, Content Development, Content Writing, Copywriting, Internet Marketing, Link Building, SEO Budget: $30 - $250 USD
Rancang Paket Pelatihan SDM Menarik Category: B2B Marketing, Business Consulting, Content Development, Human Resources, Learning Management Systems (LMS), Marketing Strategy, Proposal Writing, Training Development Budget: $15 - $25 USD
19-Apr-2026 03:53 GMT
International Project Manager for Kuddoland Toys Category: Business Plans, Digital Marketing, Graphic Design, HTML, Marketing, Product Development, Project Management, Web Design Budget: min ₹2500 INR
Comprehensive On-Page & Off-Page SEO Category: Analytics, Content Marketing, Content Strategy, Digital Marketing, Internet Marketing, Keyword Research, Link Building, Search Engine Marketing (SEM), SEO, Website Management Budget: ₹12500 - ₹37500 INR
19-Apr-2026 03:45 GMT
Optimasi Penjualan via Instagram & Facebook Category: Content Creation, Data Entry, Digital Marketing, Facebook Marketing, Instagram Marketing, Internet Marketing, SEO, Social Media Marketing Budget: $15 - $25 USD