Guides d'authentification des e-mails
Des guides pratiques et sans détour sur SPF, DKIM et DMARC. Corrigez ce qui ne fonctionne pas et gardez vos e-mails hors du spam.
Email Compliance: CAN-SPAM, GDPR and CASL Basics
A plain-English guide to the three laws that govern commercial email: CAN-SPAM in the US, GDPR in the EU, and CASL in Canada, covering consent, identification, unsubscribe, penalties, and how compliance overlaps with deliverability.
Dedicated vs Shared IP for Sending Email
A practical guide to choosing between a dedicated and a shared sending IP, weighing volume, reputation control, warmup burden, and cost, with a clear decision path.
Phishing vs Spoofing: What Is the Difference?
Spoofing is the technique of forging a sender identity; phishing is the fraud it enables. This guide explains the difference, how they overlap, and which defenses stop each.
Hard Bounce vs Soft Bounce Explained
A hard bounce is a permanent delivery failure that must be suppressed immediately; a soft bounce is temporary and worth retrying. This guide covers example SMTP codes, causes, bounce-rate thresholds, and the reputation cost of poor list hygiene.
DMARC RUA vs RUF: Aggregate and Forensic Reports
A practical comparison of DMARC aggregate (rua) and failure/forensic (ruf) reports: what each contains, how often they arrive, why Google and Yahoo skip RUF for privacy reasons, and exactly which tags to add.
What Is Greylisting and Why Email Gets Delayed
Greylisting temporarily defers mail from unfamiliar senders with a 4xx SMTP response so spam bots give up while real servers retry. Learn how the triplet works, why legitimate mail is only delayed, and what senders and admins should do.
What Is Microsoft SNDS and How to Read It
Microsoft SNDS is a free tool that shows how Outlook.com rates your sending IPs. Learn to read its data columns, enroll in SNDS and JMRP, and fix Outlook and Hotmail delivery.
What Is a Spam Trap and How to Avoid Them
Spam traps are dead or fake email addresses that flag senders with poor list hygiene. Learn the three types, how they get onto your list, the reputation damage they cause, and how to prevent hits.
What Is Spamhaus and How to Get Delisted
A practical guide to Spamhaus and its main blocklists (SBL, XBL, PBL, DBL, CSS), how listings happen, and how to check for and request removal.
What Is Sender Reputation and How to Improve It
Sender reputation is the trust score mailbox providers assign to your sending domain and IP based on complaints, bounces, spam-trap hits, engagement, and authentication. This guide explains what providers score, how to read it in Postmaster Tools and SNDS, and a practical plan to improve it.
How to Get Off an Email Blacklist (Delisting Guide)
A step-by-step delisting guide: identify which blacklist listed you, fix the root cause, submit the right removal request, and prevent re-listing. Covers Spamhaus, Barracuda, SpamCop, and the SORBS shutdown.
What Is SPF Flattening and When You Need It
SPF flattening replaces include, a, and mx mechanisms with raw IP addresses to stay under the 10-lookup limit. Learn how it works, why it breaks when provider IPs change, and safer alternatives to reach for first.