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Top Email Sending and Testing Resources

How to Embed HTML5 Video in Email
On June 23, 2022
7min read
Viktoriia Ivanenko Technical Content Writer @ Mailtrap

Email deliverability: Everything you need to know
On September 07, 2022
17min read
Many factors have an impact on whether an email will be delivered or not. Check out what to do and what to avoid to always be on the winning side!
Piotr Malek
Technical Content Writer @ Mailtrap

SPF Record Explained
On February 07, 2022
9min read
SPF (Sender Policy Framework) record is a DNS record to protect your emails from being forged. Find out more about the SPF to increase the credibility of your product.
Zakhar Yung
Technical Content Writer @Mailtrap
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Email authentication: pass, flag, reject

An Ultimate Guide to Email Authentication
On December 19, 2022
14min read
In this ultimate guide, we cover all available email authentication methods and share detailed examples for each.
Piotr Malek
Technical Content Writer @ Mailtrap

Everything You Need to Know About SMTP Security
On August 14, 2019
10min read
SMTP by its nature is not secured in any way, surprisingly. Luckily there are ways to keep your emails safe with no or little effort.
Piotr Malek
Technical Content Writer @ Mailtrap

STARTTLS vs SSL vs TLS
On October 08, 2019
6min read
With so many similar names, it's not hard to get confused. Check out our latest guide to email encryption.
Piotr Malek
Technical Content Writer @ Mailtrap
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How to Test Emails in PHP
On May 28, 2020
6min read
Let’s discuss how to test and preview emails in your PHP app or website during development!
Diana Lepilkina
Content Specialist @Mailtrap

SMTP Server for Testing: Cloud-based or Local?
On September 27, 2018
4min read
How would you approach choosing an SMTP server for testing? Find the key factors to consider in this blog post.
Diana Lepilkina
Content Specialist @Mailtrap

How to Test Emails in Mandrill, Sendgrid, and Mailgun
On May 21, 2019
6min read
Learn about the options for quality email testing proposed by each of listed sending providers and decide whether a third-party dedicated testing service will be the right choice.
Yevgen Tsvetukhin
Product Manager @Mailtrap
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Sendgrid vs Mandrill vs Mailgun – How to Choose?
On April 29, 2019
10min read
Which features of the email service provider matter the most? Let’s review and compare Sendgrid, Mandrill, and Mailgun, the most popular email services.
Yevgen Tsvetukhin
Product Manager @Mailtrap

11 Tips to Improve Your Email Marketing in 2021
On November 30, 2020
9min read
The new year can be an excellent opportinity for improving your email marketing. Our friends from HubSpot share what to focus on in 2021.
Irina Nica
Senior Marketing Manager @Hubspot

Intro to Transactional Emails
On August 28, 2019
11min read
Transactional emails are an inseparable part of any customer experience, for a reason! Learn what they’re used for and how to make yours better in no time.
Piotr Malek
Technical Content Writer @ Mailtrap
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Private: What Makes Mailtrap a Unique Email Testing Tool?
On January 28, 2020
4min read
Test Bcc, preview messages, inspect HTML errors right away, and conduct other crucial email checks in one tool. Yes, that’s all about Mailtrap, a simple but super powerful tool for safe email testing.
Diana Lepilkina
Content Specialist @Mailtrap

Share Your Email Testing Results with Team Members
On July 03, 2019
3min read
Learn how Mailtrap can help you increase the efficiency of your email testing process. Features for organizing your test data and sharing results with your colleagues and clients are explained in this post.
Yevgen Tsvetukhin
Product Manager @Mailtrap

Using and Testing Cc and Bcc in SMTP Protocol
On August 28, 2019
5min read
Referring to the SMTP mechanics, we define the main email headers and the Bcc specific in this post. We also share a few email tips and explain how you can test Bcc with Mailtrap.
Yevgen Tsvetukhin
Product Manager @Mailtrap
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The Latest Posts

How to Send HTML Emails in Java: 2023 Guide
On September 26, 2023
7min read
This article guides Java developers in sending HTML emails using the JavaMail API and Mailtrap, covering SMTP setup, embedded images, attachments, multiple recipients, and email testing.
Denys Kontorskyy
Technical Content Writer @Mailtrap

Complete Guide on Sending HTML Emails with Python
On September 25, 2023
23min read
Find out how to send HTML email with Python: using SMTP, Email API, with attachments, images, and to multiple recipients. Email testing covered.
Veljko Ristić
Content Manager @ Mailtrap
HR newsletter ideas

Boost Co-worker Engagement With These 20 HR Newsletter Ideas 
On September 24, 2023
25min read
Take a look at 20 best HR newsletter ideas before launching your next campaign to increase employee engagement, improve loyalty, and build a work culture!
Quinn Malloy
Copywriter and Marketing Professional @CloudTalks

10 Drip Email Campaign Examples to Inspire Your Strategy
On September 14, 2023
10min read
We've collected the 10 best drip email campaign examples and analyzed what makes them so effective. Click here to learn valuable insights for your future campaigns.
Whitney Blankenship
Content Marketing Manager @Drip

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