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Field notes on deliverability, Klaviyo, SMS and retention for ecommerce brands. Star the ones you want to keep, or follow by RSS.

Latest articles

  • Fernando Portela

    How to resolve a sudden Gmail 550 5.7.1 (unread)

    Learn how to fix Gmail’s 550 5.7.1 error and stop your emails from being rejected. Discover what triggers it, what content to avoid, and how to restore your sender reputation with Google’s reconsideration form.

  • Fernando Portela

    The End of IP & Domain Reputation in Gmail Postmaster Tools (unread)

    Gmail quietly changed how deliverability will be measured. The removal of IP and domain reputation metrics from Gmail Postmaster Tools marks the end of an era for performance tracking.

  • Fernando Portela

    Gmail Deliverability Issues in September–October 2025? Try this (unread)

    If your emails keep landing in Gmail’s spam folder, Google’s new Sender Contact Form might help. It lets you request a review of your domain’s filtering status and possibly recover your inbox placement faster.

  • Fernando Portela

    How Email and SMS Marketing Work Like a Snowball: Small Tweaks, Massive Impact (unread)

    In digital marketing, growth rarely happens overnight. The brands that stand out don’t get there by luck, but by consistent refinement. Email and SMS marketing work exactly like a snowball rolling down a mountain: it starts small, but as it keeps moving and gathering momentum, it becomes an unstoppable force.

  • Fernando Portela

    iOS 18.5 Update: What It Means for Email & SMS Marketing in 2025 (unread)

    Learn how Apple’s iOS 18.5 update impacts email and SMS marketing, from Mail AI summaries and inbox tabs to RCS messaging and privacy rules. Actionable tips for marketers.

  • Fernando Portela

    Why Attribution Windows Are Misleading Your Campaign Reports (And How to Fix Them) (unread)

    If your ESP or MSP uses long attribution windows, your email and SMS campaigns might show inflated revenue. Learn the best attribution window settings and how to change them for accurate campaign reporting.

  • Fernando Portela

    Microsoft’s New Bulk Email Rules (2025): What You Need to Know and Do Now (unread)

    Starting May 2025, Microsoft is enforcing new bulk email rules for senders reaching 5,000+ users daily. You’ll need SPF, DKIM, and DMARC, clear unsubscribe options, valid sender addresses, and low spam complaint rates.

  • Fernando Portela

    Verizon Is Raising Carrier Fees for SMS & MMSs (unread)

    Verizon is increasing SMS and MMS carrier fees on June 1. Businesses should review their messaging strategy to manage higher costs and maintain ROI.

  • Fernando Portela

    Tariffs, Slowdowns & Uncertainty: What This Means for Ecommerce (and Your Email/SMS Strategy) (unread)

    Tariffs and shipping chaos are hitting ecommerce hard. Smart brands are turning to email and SMS to retain customers, boost loyalty, and keep revenue flowing during uncertainty.