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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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 Ports 25, 465, 587, and 2525: Which to Use
Email Deliverability

SMTP Ports 25, 465, 587, and 2525: Which to Use

Choose the correct SMTP port: 25 for server relay, 465 for implicit TLS, 587 for STARTTLS submission, and 2525 only as a provider fallback.

Mar 17, 2026 3 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 Email Sender Requirements in 2026
Compliance

Google and Yahoo Email Sender Requirements in 2026

Current Google and Yahoo sender requirements for authentication, DMARC alignment, DNS, spam rates, and one-click unsubscribe, checked for 2026.

Mar 16, 2026 5 min read
SMTP Relay vs Direct Sending: Differences and Use Cases
Email Infrastructure

SMTP Relay vs Direct Sending: Differences and Use Cases

SMTP relay outsources queues and delivery; direct-to-MX sending gives full control and full operational responsibility. Compare architecture, cost, and use cases.

Mar 16, 2026 4 min read
How to Build a B2B Email List from Scratch: Ethical Methods That Work
Lead Generation

How to Build a B2B Email List from Scratch: Ethical Methods That Work

Build a B2B email list ethically. Use public data, enrichment tools, and content marketing, not purchased lists.

Mar 16, 2026 9 min read
Cold Email for Startups: Get Your First 100 Customers Without a Budget
Cold Outreach

Cold Email for Startups: Get Your First 100 Customers Without a Budget

Acquire your first 100 customers with cold email. This guide details how to master outreach without a budget.

Mar 16, 2026 9 min read
Cold Email Automation: How to Build Sequences That Convert
Cold Outreach

Cold Email Automation: How to Build Sequences That Convert

Build converting cold email sequences. Combine personalization, multi-touch follow-ups, and smart logic for better outreach.

Mar 16, 2026 8 min read
Email Deliverability Audit: How to Run a Complete Check in 60 Minutes
Email Deliverability

Email Deliverability Audit: How to Run a Complete Check in 60 Minutes

Boost inbox reach. Audit your email deliverability in 60 minutes for better sender reputation and engagement.

Mar 16, 2026 9 min read
Email Blacklist Removal Guide: Step-by-Step for Every Major Blacklist
Email Deliverability

Email Blacklist Removal Guide: Step-by-Step for Every Major Blacklist

Remove your IP or domain from email blacklists. Identify the blacklist, fix the issue, then follow delisting steps for each.

Mar 16, 2026 10 min read
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