Email Security, Email Deliverability
How to Read Email Headers to Spot Phishing and Spoofing
Anyone can fake a sender name - the email headers are the receipts. Learn to read Authentication-Results and the Received chain to catch a spoof in seconds.
Email Deliverability, Email Security
What Is TLS-RPT? How to Set Up MTA-STS Safely (Step by Step)
TLS-RPT tells you when senders cannot reach your mail server securely. Learn how it works, what the reports mean, and the safe order to set up MTA-STS without breaking your email.
Deliverability Audit, Email Authentication, Email Deliverability
Email Domain Health Check: 8 Checks Every Domain Needs
Run a free email domain health check and understand every result. MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI and DNSSEC explained simply, with the...
Email Deliverability, Email Tools
Google Postmaster Tools: Plain-Language Verdicts
Google Postmaster Tools now shows plain-English verdicts like "users don't want your email." See all 7 reasons, real screenshots, and what they mean.
SPF, DKIM & DMARC Guide: Modern Email Authentication Protection
Learn how to implement SPF, DKIM, and DMARC to protect your domain from email spoofing. Complete step-by-step guide with examples and best practices...
B2B Emails, Cold Emails, Deliverability Audit
Why No Tool or Template Can Fix Your B2B Email Deliverability in 2026
Old play books and purchased lists are killing your deliverability. Learn how adaptive B2B email systems deliver inbox placements and replies in 2026.
How to Set Up Your Domain on GoHighLevel for Email Marketing (2025 Edition)
Learn how to set up your email sending domain on GoHighLevel. Improve email deliverability with step-by-step DNS setup.
6 Strategies to Control Your Spam Complaint Rates
If you're struggling with low open rates it's time to look 6 Strategies to Control Your Spam Complaint Rates
Cold Emails, Email Deliverability, Email Tools
Do Email Warmup Tools Work in 2025?
Are email warmup tools still effective in 2025? We tested all major providers and found most show no real improvement in deliverability or domain...
Preparing for Changes in Email Tracking and Privacy Regulations in 2025
Stay ahead of the 2025 email tracking and privacy regulation changes. Learn how Gmail, Apple, and Microsoft are altering email tracking, why open rates...
How to Set Up a Catch-All Email Address in Microsoft 365
Learn how to create a catch-all in Microsoft365 using mail flow rules, configure MX records, and change domain status to Internal Relay. Ensure no...
Cold Emailing in 2025: What’s Working & What’s Not?
Discover the latest cold emailing strategies for 2025! Learn what works and what doesn't, from email sequencing and delivery streams to campaign...
Deliverability Interview Series, Email Deliverability, Interviews
Deliverability Interviews - Radek Kaczyński from Bouncer
Bouncer is an easy to use and easy to integrate email verification solution.. Read our deliverability interview with Radek from Bouncer.
Deliverability Interview Series, Email Deliverability, Interviews
Deliverability Interviews - Sebastian Kluth from Certified Senders Alliance
In interview 5 of the deliverability interview series we spoke to Sebastian Kluth from Certified Senders Alliance.
Deliverability Interview Series, Email Deliverability, Interviews, Technology
Deliverability Interviews - Anders Berggren from Halon
Interview with Anders Berggren about Halon - a large scale MTA, its features and how it helps with email deliverability.
Deliverability Interview Series, Email Deliverability, Interviews
Deliverability Interviews - Damien Brenelière from Mailreach
Read this interview to understand how a good domain warmup tool like Mailreach can help you achieve email deliverability
Deliverability Interview Series, Email Deliverability, Interviews
Deliverability Interviews - Arun Kumar from Zoho
Interview with Arun Kumar from Zoho Campaigns team. Arun talks about various aspects of email deliverability and how Zoho has implemented these practices.
Deliverability Interview Series, Email Deliverability, Interviews
Deliverability Interviews - Przemysław Kuciel from Omnisend
Interview with Przemysław Kuciel from Omnisend about different email deliverability challenges and best practices.
MassMailer Review: Native Salesforce Email Marketing App for Large Campaigns
Do you feel constrained with Salesforce CRM's email marketing capabilities. See this review of MassMailer a native Salesforce app.
The Different Types Of Lead Nurturing Campaigns
Do you know what different types of lead nurturing campaigns you can run? Read this detailed articles to find out.
Cold Emails, Email Deliverability, Interviews
Interview: Ajay Goel, Founder of GMass on the secrets of cold emails and the journey of GMass
Interview of Ajay Goel, founder of GMass on secrets of cold emails and the journey of GMass.
Email Deliverability, Interviews
Interview: Vaibhav Namburi, Founder of SmartWriter on email deliverability with personalisation
An exclusive interview of Vaibhav Namburi on how Smartwriter came in to being and how it is helping people achieving deliverability.
What and How of Lead Nurturing
Do you understand what lead nurturing is and how to start nurturing your leads. This article gives you all the details to nurture your leads.
Cold Emails, Email Marketing, Products
Mailshake Review: Leverage Multichannel Sales Outreach via Personalized Emails, Social and Phone
Mailshake Product Review: Mailshake helps businesses constantly stay in touch with a prospect with a multichannel approach
Mailchimp Guide | Landing pages for beginners
Do you know what is a landing page and how is it different from a web page? Do you know you can use Mailchimp for landing page?
Cold Emails, Email Deliverability, Products
Smartwriter Review: Improve cold emails deliverability with AI based personalisation
Smartwriter is a personalisation outreach tool that helps to improve email deliverability - read this Smartwriter review.
Mailchimp Guide | How to start email marketing with Mailchimp in 15 mins
Mailchimp guide to help you start email marketing with Mailchimp in 15 minutes. At the end of this guide, you will go from a Mailchimp beginner to an...
PostBox Consultancy Services Cold Email Guide
Step by step guide for cold emailing. Learn how to plan for cold emailing, what tools to use and the best practices
Email Tools, Products, Technology
Sendy Installation and Setup on Linux (Ubuntu and CentOS)
Sendy is a very popular self hosted email newsletter tool. Let's see how to install it on Linux (Ubuntu and CentOS)
Interview: Alex Markov, CEO at G-Lock Software on achieving email deliverability with GlockApps
An exclusive interview with Alex Markov, CEO at G-Lock Software on achieving email deliverability with GlockApps
Mailhog for email test environment
You often need to send tons of test emails during application development and you need a quick solution for that. Mailhog is the answer.
Email Deliverability, Email Tools, Products
GlockApps Review: Inbox Placement and Spam Score Testing Tool
GlockApps is a Swiss army knife for every email marketer to run an inbox placement test with a well covered seed list.
Deliverability Audit, Email Deliverability
What is an email deliverability audit
At Postbox Consultancy Services we conduct a through email deliverability audit covering every minute aspect of your emailing
Cold Emails, Email Servers, Email Tools
Integrate Google Workspace (earlier GSuite) with external SMTP server - bypass daily limits and improve deliverability
This article explains how you can integrate your Gsuite with external SMTP to bypass GSuite daily sending limits.
GNU Mailman: An open source mailing list management tool
GNU Mailman is an open source software for managing announcement and discussion lists and it belongs to GNU Projects.
How To Automate and Monetize Your Email Newsletters
Do you wonder if it is possible to monetize an automated email newsletter? This article will guide you about that.
How to set up a catch-all for your subdomain using Google Workspace
For various reasons, you may be looking to set up catch-all on one or many of your subdomains. This blog has detailed instructions.
Email Security, Email Tools, Technology
Are you a law firm using Microsoft 365? Have you encrypted your confidential emails using Office 365 Message Encryption (OME)
Office 365 Message Encryption (OME): If you use emails to exchange sensitive information and think that the sensitive information may leak into the...
Email Marketing, Email Tools, Products, Technology
Mailwizz Installation steps on Ubuntu 18.04
Mailwizz is a fully-featured self hosted email marketing application. It has unique features to improve deliverability.
How to Manage Your Inactive Email Subscribers
Inactive email subscribers can be detrimental. Focus to identify and manage inactive email subscribers to create correct email list segments.
Top 10 Best Practices for Welcome Email Series
Welcome emails are very important to connect with the subscriber. Let's learn the top 10 best practices for welcome emails
Email Deliverability, Email Design, Email Marketing
Best practices for designing an email newsletter template
This blog post discusses the best practices to design a good looking and highly engaging email newsletter template.
Getting low open rates on your email? Resolve your email marketing problems
Why do you get low open rates on your email marketing campaigns? This blog hast steps to improve your email campaigns open rates
Cold Emails, Email Deliverability, Email Marketing
Plain text vs HTML Emails | Which one should I use?
Plain text vs HTML emails. Let's dive in to the details and see which one should be used in which scenario.
Email Marketing vs Social Media Marketing | Things You Need to Know.
Do you have to choose between email marketing and social media marketing? You would be surprised how integrating social media into a killer email...
Top 7 Best Practices for Email Footer Design
Let's see what is an email footer, what is its importance and what are the top 7 best practices for email footer design
Cold Emails, Email Deliverability, Email Marketing, Email Tools
How To Land In Gmail's Primary Tab
Recipients check the Gmail's promotions tab with less interest. How to land in gmail inbox's primary tab. Let's find out.
Email Servers, Products, Technology
Let's setup Zimbra 9.0.0 on Ubuntu 18.0.4 and configure letsencrypt SSL certificates on it
Zimbra (ZCS)Â is an open source and free for personal use, collaborative software platform. Let's see how to install it on Ubuntu 18.04
What is an Email Marketing Funnel and How To Build It
The three primary goals of an email marketing funnel are to educate, nurture, and nudge. Let's learn more about an email marketing funnel.
Cold Emails, Email Deliverability, Email Marketing
What is Cold email | 15 Pro Tips To Write Cold Emails
A cold email is an email you send to someone who is a business prospect but stranger to you. Here are 15 pro tips to write cold emails.
Deliverability Audit, Email Deliverability, Email Marketing, Email verification
What is an email deliverability manager and why do you need one
Do you know the significance of an email deliverability manager or email deliverability agency? Read this blog to find why you might need one
Best Practices for Political Campaign Emails and SMS Campaigns - Part 2
SMS campaigns have a 98% open rate. With only 39% of marketers using SMS, this could be an untapped avenue for direct, targeted political campaign messages.
Best Practices for Political Campaign Emails - Part 1
Political campaign emails can help senders build relationships with their communities by sending personalized content.
Interview : Cathy Patalas, Chief Growth Officer at Woodpecker on the secret to cold email marketing
An exclusive interview with Cathy Patalas, Woodpecker’s Chief Growth Officer. Patalas has been with the company since the start in 2015
Woodpecker Product Review: A tool to save your business time in follow-up emails
Woodpecker Review - A Tool To Save Time in Cold Email Outreach by Quick Automation. They have a great academy to learn cold emailing.
Email verification, Email Deliverability, Email List Cleaning
Anatomy of Email List Cleaning | A Complete What,Why, How and Where
Do you know what is email list cleaning or email list hygiene? Read this anatomy of email list cleaning | A complete what, why, how and where
Email Deliverability Checklist To Ensure Inbox Placement Of Your Emails
Postbox Services has developed this email deliverability checklist after studying and researching all email deliverability best practices
How to Shift Your Email Marketing Message During Difficult Times
How to shift your email marketing message during difficult times. After COVID lock downs now is the time to update your email copy.
Replyify Product Review: Automate Cold Email Outreach for Your Business
Replyify Review - Replyify helps to automate cold email outreach while still allowing you to personalize as much as possible
Use social proofs in your email marketing to improve your email deliverability
Social proofs can be used in email marketing. It helps in improving campaigns credibility and email deliverability. Let's learn how.
15 Tips to Improve Your Email Marketing Conversion Rates
Are you struggling with your email marketing conversion rates? Let us help you with these 15 tips. Included a deliverability checklist.
5 Things to Keep in Mind in the Post-Lockdown Era: Using B2B Email Marketing to Announce Your New Product
This article tells you 5 things you need to keep in mind while planning your email campaigns to announce new products after lock down.
Top 5 Tips to Create an Email Drip Campaign
Email drip campaigns are used to connect with customers individually and repeatedly with the help of an autoresponder.
Email verification, Email List Cleaning
The importance of email verification
Email verification or email list cleaning is an important step in maintaining a healthy email list. Let's learn the importance of email verification
Sending confidential emails with Gmail has become a whole lot easier
Do you know you can send confidential emails in gmail? If not read this article. The article has details of different modes to secure email.
15 Days of Email Deliverability
If you are facing any email deliverability issues and need help please contact us.
Gmail now lets you send multiple emails as attachments
One of the more useful features that were available on many other email providers, but not Gmail, was sending multiple emails as attachment in a single...
Email and deliverability practices to avoid during the holiday rush
Holiday season is a rush for email marketers and this rush leads to many mistakes. Let's learn how to avoid these email marketing mistakes.
Email Authentication, Email Deliverability
Parsedmarc - Open source DMARC report analyzer and visualizer
Let's learn about ParseDMARC. An open source DMARC analyzer - alternative to commercial DMARC report processing tools.
Email marketing | Year in review 2019 and whats in store for 2020
Email Marketing: Year in review 2019 and what is in store for 2020. AMP for email will be the latest rollout.
AMP for Email in 2020: Is Your Email Marketing Program Ready?
AMP for Email in 2020: Is your email marketing program ready for dynamic emails? Let's learn more about AMP for email
10 Things to keep in mind while designing your abandoned cart emails series
Do you know what are the 10 things to keep in mind while designing your abandoned cart emails series. Let us find out.
Let's Set Up iRedMail - a Full-Featured Mail Server on Ubuntu 18.04, secure it with Letsencrypt SSL certificates and configure Thunderbird
Steps to install iRedmail on Ubuntu 18.04. iRedmail is an open source email server which is very easy to install and configure.
Email Deliverability, Email Marketing
How to Start Preparing for Black Friday Email Marketing
Black Friday and Cyber Monday email marketing preparation. Let's learn about all best practices to follow to get best email deliverability.
Feedbackloop - what is it and how to signup ?
What is a feedback loop and why should you be signing it up while setting up your bulk emailing system. Let's dive in to details.
Email Authentication, Email Deliverability, Email verification
What is an SPF record?
An SPF (Sender Policy Framework) record is used to indicate which hosts are authorised to send emails for a domain. It is defined in RFC 4408 and...
Email Authentication, Email Deliverability
What is a DMARC record ?
DMARC stands for “Domain-based Message Authentication, Reporting & Conformance.”  DMARC is built upon two other authentication protocols: SPF (Sender...