Know-how for senders
Guides
Practical know-how on deliverability, authentication and privacy for email senders – clear and up to date for 2026.
What SPF, DKIM and DMARC check, what the DNS records look like and the order to roll them out without losing mail.
Read7 min read · October 8, 2026Implementing double opt-in properlyWhy newsletters in the EU need provable consent, how double opt-in works and what you need to log.
Read6 min read · October 10, 2026Gmail and Yahoo sender requirements explainedSince 2024 Gmail and Yahoo require authentication, one-click unsubscribe and low spam rates. What applies to whom – and how to comply.
Read8 min read · October 13, 2026Sending email under the GDPR: what businesses need to knowData processing agreements, third-country transfers, retention and tracking: GDPR duties when sending through an email provider.
Read6 min read · October 15, 2026Understanding and reducing bouncesHard bounce, soft bounce, policy rejection: what SMTP codes mean, when to suppress addresses and how to lower your bounce rate.
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