Postigo Blog

Blog about mailings
and deliverability growth

Practical tips, case studies, and guides on email marketing, deliverability, and mailing automation.

How to Use Spintax in Cold Email to Improve Deliverability
Cold Outreach

How to Use Spintax in Cold Email to Improve Deliverability

Spintax allows you to create unique email variations by rotating synonyms and phrases within curly brackets to bypass spam filters. This technique prevents email providers from flagging your messages as repetitive content, ensuring your deliverability and sender reputation remain high.

May 16, 2026 7 min read
Optimizing Cold Email Send Times for Higher Open Rates
Cold Outreach

Optimizing Cold Email Send Times for Higher Open Rates

Boost cold email opens by sending Tuesdays-Thursdays, 10 AM-2 PM. Tailor timing to your audience for best results.

May 1, 2026 11 min read
SMTP Proxy: Boost Deliverability & Scale Cold Outreach
Email Infrastructure

SMTP Proxy: Boost Deliverability & Scale Cold Outreach

SMTP proxy boosts email deliverability and scales cold outreach. It manages IP reputation, load balancing, and connection handling.

Apr 27, 2026 11 min read
Advanced Email List Segmentation for Hyper-Targeted Campaigns
Email Marketing

Advanced Email List Segmentation for Hyper-Targeted Campaigns

Segment your email list for hyper-targeted campaigns. Deliver relevant content, boosting engagement and conversions.

Apr 14, 2026 10 min read
Building a Prospect List: The Ultimate Guide to B2B Lead Generation
Lead Generation

Building a Prospect List: The Ultimate Guide to B2B Lead Generation

Master B2B lead generation. Build a strong prospect list with strategic tools and methods.

Apr 6, 2026 9 min read
Boost Cold Email Replies: Crafting Irresistible CTAs
Cold Outreach

Boost Cold Email Replies: Crafting Irresistible CTAs

Boost cold email replies with irresistible CTAs. Focus on clarity, low commitment, and specific, benefit-driven actions.

Apr 4, 2026 9 min read
Advanced Cold Email Sequencing: Strategies for 2024
Cold Outreach

Advanced Cold Email Sequencing: Strategies for 2024

Boost conversions with 2024 cold email strategies. Multi-channel, personalized sequences drive results.

Mar 24, 2026 10 min read
Building an ICP for Cold Email: A Step-by-Step Guide
Lead Generation

Building an ICP for Cold Email: A Step-by-Step Guide

Craft an ICP for cold email by analyzing best customers, firmographics, psychographics, and pain points. This boosts engagement and conversions.

Mar 20, 2026 10 min read
SMTP Port Numbers: A Comprehensive Guide for Email Deliverability
Email Deliverability

SMTP Port Numbers: A Comprehensive Guide for Email Deliverability

SMTP ports are channels for email transmission, like 25, 465, and 587. Choosing the right port impacts deliverability and security.

Mar 17, 2026 9 min read
Email Warm-up for Agencies: Maximize Deliverability & Client ROI
Email Deliverability

Email Warm-up for Agencies: Maximize Deliverability & Client ROI

Boost client email deliverability and ROI. Warm-up ensures your agency's emails land in inboxes, not spam.

Mar 16, 2026 10 min read
Cold Email vs LinkedIn Outreach: Which Channel Wins for B2B in 2026?
Lead Generation

Cold Email vs LinkedIn Outreach: Which Channel Wins for B2B in 2026?

Cold email and LinkedIn outreach are key B2B channels. Learn which wins for 2026 strategy.

Mar 16, 2026 13 min read
Google and Yahoo Sender Requirements 2026: What Cold Emailers Must Know
Compliance

Google and Yahoo Sender Requirements 2026: What Cold Emailers Must Know

Google and Yahoo's 2026 sender rules demand strong email authentication and low spam rates. Cold emailers must adapt now for future deliverability.

Mar 16, 2026 8 min read
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