Email deliverability and security articles

Tutorials and news on email authentication, sending reputation, Microsoft 365 and Google Workspace.

Illustrative Gmail AI Inbox interface showing priority action items and AI-assisted conversation summaries.

News

Gmail AI Inbox comes to Google Workspace: does AI change email visibility?

October 17, 2026 - 12 min

Gmail AI Inbox is reaching Google Workspace. Understand eligibility, rollout and the difference between SMTP delivery, Gmail placement and AI visibility.

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Google Auth Platform requiring OAuth clients used by AI agents to be identified for Gmail MCP server access.

News

AI agents and Gmail: Google tightens OAuth controls for mailbox access

October 13, 2026 - 12 min

From November 2026, OAuth clients calling Gmail MCP must be marked as AI agents. Learn the exact scope, deadlines, permissions and security controls.

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Exchange Online Send From Alias feature allowing an Outlook user to choose a secondary SMTP address when composing an email.

News

Exchange Online send from alias is now generally available

October 8, 2026 - 13 min

Enable Exchange Online send from alias, choose between an alias and a shared mailbox, test Outlook clients, and verify SPF, DKIM and DMARC alignment.

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Google Workspace Studio Gmail workflow using Gemini and the Send a reply step to respond within an existing email thread.

News

Google Workspace can now reply to emails automatically: security and governance risks

September 30, 2026 - 12 min

Workspace Studio can reply in existing Gmail threads. Examine external approvals, context mistakes, sensitive data and the controls needed before enabling flows.

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Azure Communication Services Email retirement scheduled for September 2028 and migration of applications to a replacement platform.

News

Azure Communication Services Email retirement: what alternatives for transactional email?

September 27, 2026 - 13 min

Azure Communication Services Email retires on September 30, 2028. Understand the scope and plan a safe migration for Azure transactional email workloads.

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Illustrative Gmail Search interface showing AI Overviews generating an answer from multiple relevant business emails.

News

Gmail Search AI Overviews: what changes for business email users

September 20, 2026 - 10 min

Gmail AI Overviews answers natural-language searches using existing messages. Learn who can use it and how to govern privacy, retention and source verification.

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Multiple users and applications sharing the tenant-wide external recipient limit in Microsoft Exchange Online.

News

Exchange Online TERRL: understanding Microsoft’s tenant external recipient limits

September 17, 2026 - 12 min

A practical guide to Microsoft’s Tenant External Recipient Rate Limit: external recipient counts, tenant quota, reporting, blocks and application email architecture.

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Migration of Exchange Web Services applications to Microsoft Graph in Exchange Online.

News

Exchange Online EWS retirement: how to migrate applications without breaking business workflows

August 27, 2026 - 13 min

Find EWS dependencies, use EWSAllowedAppIDs as a temporary control and migrate business applications to Microsoft Graph without disrupting workflows.

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Microsoft 365 Business primary Exchange Online mailbox capacity increasing from 50 to 100 GB.

News

Microsoft 365 Business mailboxes move to 100 GB: what really changes in Exchange Online

August 22, 2026 - 12 min

Which Business mailboxes reach 100 GB? A practical guide to Exchange Online service plans, archives, shared mailboxes, custom quotas and admin checks.

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APRF illustration showing DKIM-authenticated emails and aggregate performance reports for inbox placement, spam placement and engagement

News

APRF: The New Standard That Could Transform Email Deliverability Reporting

July 22, 2026 - 10 min

APRF could complement DMARC with aggregate reports on real inbox placement, spam placement and user engagement. Learn what it means for deliverability.

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Infographic showing DMARC protection levels in France in 2026, including full protection, partial protection and no effective protection

News

DMARC Adoption in France: Where Do We Stand in 2026?

May 27, 2026 - 10 min

73.6% of observed domains in France still lack effective DMARC protection. Discover the 2026 statistics, the gaps and the practical actions to take.

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Diagram showing the transition from RFC 7489 to the new DMARCbis RFCs 9989, 9990 and 9991

News

DMARCbis: What Changes with the New RFC 9989, 9990 and 9991

May 21, 2026 - 9 min

DMARCbis replaces RFC 7489 with the new RFC 9989, 9990 and 9991. Learn what changes for DMARC, reports, domains and email security.

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Map of SMTP code families 2xx, 4xx and 5xx with their meaning

Tutorials

SMTP Error List: Codes, Causes and Fixes

May 20, 2026 - 13 min

A practical guide to common SMTP error codes, probable causes, priority levels and corrective actions for email troubleshooting.

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Diagram of an email journey with SPF, DKIM and DMARC verification

Tutorials

How to Configure SPF, DKIM and DMARC Without Breaking Email Delivery

May 18, 2026 - 12 min

A safe, progressive method to configure SPF, DKIM and DMARC without blocking legitimate business email.

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DMARC XML report excerpt: source_ip, count, policy_evaluated with DKIM pass and SPF fail, header_from, and a DMARC pass result

Tutorials

How to Read a DMARC XML Report and Identify Who Sends Email From Your Domain

May 17, 2026 - 9 min

Understand DMARC aggregate XML reports, identify senders and separate legitimate traffic from errors or suspicious use.

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Sending architecture separating the main domain and marketing, transactional, support and notification subdomains

Tutorials

How to Create a Sending Subdomain for Brevo, ActiveCampaign or Mailjet

May 16, 2026 - 12 min

Why and how to isolate marketing email on a sending subdomain with SPF, DKIM, tracking and DMARC.

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Diagnostic tree explaining why an email lands in primary inbox, Promotions, spam, is rejected or is not received

Tutorials

Why Do My Emails Land in Spam or Gmail Promotions?

May 15, 2026 - 12 min

A practical diagnostic method for spam, Gmail Promotions, rejection, reputation, content, engagement and authentication.

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DNS verification steps for a domain in Google Postmaster Tools using a TXT record

Tutorials

How to Set Up and Use Google Postmaster Tools to Monitor Email Reputation

May 14, 2026 - 12 min

A tutorial to verify a domain in Google Postmaster Tools, read the metrics and act on email reputation signals.

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