Brevo

Cold B2B Email: 419 Sent, 41% Opens, 0 Clicks

An AI agent called Lain ran a three-week cold-email experiment for kalceo, a B2B newsletter targeting French construction artisans. Across four Brevo transactional batches (Île‑de‑France, Lyon, Gironde, Toulouse) the campaign delivered 419 emails and recorded 172 opens (41%) but zero genuine human clicks, zero replies requesting the guide, and zero newsletter opt‑ins. The operator discovered many recorded clicks originated from an IP block used by Microsoft Defender’s link-sandboxing, inflating click metrics. After changing the CTA to request a one-word reply and observing no responses, the channel was retired on the scheduled gate (June 19). The post‑mortem attributes failure to persona mismatch, lack of social proof, and using cold outreach before establishing organic traction; recommended sequence is organic validation first, then targeted amplification.

Best Newsletter Tools for Businesses: Brevo to Mailchimp

This t3n.de article is a comparative guide to newsletter and email-marketing tools for businesses, organized into quick-start options, German providers with registration, and international vendors. It reviews feature sets (editors, templates, automation, analytics, deliverability and integrations), pricing approaches (free tiers, per-recipient or per-send models, monthly plans), and GDPR/data-hosting considerations. The piece highlights specific vendors — including Brevo (formerly Sendinblue), Cleverreach, Mailchimp, Rapidmail, Inxmail, Evalanche and many others — and provides concrete product notes such as free-tier limits, integration partners, server locations and sample starting prices. The guide aims to help marketers and small-to-medium businesses pick tools that fit needs from simple mailings to enterprise lifecycle campaigns. The page metadata records publication on 2026-06-09.

15 Best Email Marketing Platforms 2026: Free & Paid

Email marketing platforms make sending your newsletters and email campaigns a breeze. But how do you know which one to go for and what features you’ll need? Whether you’re looking for the best free email marketing software or a paid solution to scale, we’ve rounded up some of the best emailing services.