Блог Bulko

Blog about mailings
and deliverability growth

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

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

Building a Prospect List: The Ultimate B2B Lead Generation Guide

Build a B2B prospect list with targeted data, email validation, and continuous refinement. This guide helps find B2B leads and optimize outreach.

Jul 19, 2026 10 min read
Optimizing Cold Email Campaigns with A/B Testing Best Practices
Cold Outreach

Optimizing Cold Email Campaigns with A/B Testing Best Practices

A/B test cold emails to find what works best. Improve open, click, and reply rates with data-driven changes.

Jul 17, 2026 10 min read
The Nine-Word Email: Your Best Secret Weapon
Email Marketing

The Nine-Word Email: Your Best Secret Weapon

The nine-word re-engagement email that revives cold leads by asking one simple question.

Jul 7, 2026 3 min read
14 Examples of Creative Re-Engagement Emails
Email Marketing

14 Examples of Creative Re-Engagement Emails

Fourteen creative win-back and re-engagement email examples to reactivate dormant subscribers.

Jul 7, 2026 1 min read
Case Study: Mashable and the 5 Must-Have Elements of a Solid Newsletter
Email Marketing

Case Study: Mashable and the 5 Must-Have Elements of a Solid Newsletter

A breakdown of Mashable's newsletter and the five elements every high-performing email newsletter needs.

Jul 7, 2026 4 min read
Best Cold Email Software for Agencies: A Comprehensive Guide
Cold Outreach

Best Cold Email Software for Agencies: A Comprehensive Guide

Agencies need robust cold email software for scaling client acquisition. Top platforms offer multi-client management, personalization, and deliverability.

Jul 6, 2026 9 min read
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
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