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Top Email Sending and Testing Resources

Email throttling: the ultimate guide for technical teams
On April 02, 2026
11min read
Email throttling is what happens when your email provider slows down or blocks your mail sending because you’ve exceeded the email delivery rate. Check out the best practices to handle this issue.
Julia Gulevich
Head of Customer Success @GlockApps
This is a symbolic graphic representation of email deliverability agencies for an article that covers the topic in detail.

8 Best Email Deliverability Agencies Reviewed
On March 31, 2026
13min read
I’ve reviewed 8 best email deliverability agencies on pricing, services, case studies, testimonials, and more.
Veljko Ristić
Content Manager @Mailtrap

Inbox Placement: A Beginner’s Guide
On March 24, 2026
8min read
Inbox placement should concern you even more than email deliverability! Learn what inbox placement is, how to calculate it, and how to improve the metric!
Daria Roshchyna
Technical Content Writer @Mailtrap
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Salesforce Email Integration: A Comprehensive Guide
On November 25, 2025
5min read
Looking to streamline your business communication? This article provides step-by-step instructions on integrating Salesforce with Outlook and Gmail, enhancing your CRM processes, and uncovering the potential benefits and limitations of each.
Yevhenii Odyntsov
Content @Mailtrap
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This is a graphic representation of an email blacklist, for an article that covers the topic in detail.

Email Blacklists Explained: Causes, Solutions, Prevention
On January 24, 2025
9min read
Find out what an email blacklist is, how it works, what are the reasons to get blacklisted, and how to get off the blacklist and avoid it in the future.
Dzenana Kajtaz
Technical Content Writer @Mailtrap

Email Client Testing Explained
On September 02, 2024
11min read
Learn how to test emails in different email clients using Email Sandbox, Litmus, Email on Acid, and more.
Diana Lepilkina
Content Specialist @Mailtrap

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How to Configure WordPress SMTP Settings 
On January 09, 2026
9min read
Learn how to set up WordPress SMTP to send transactional or marketing emails using PHPMailer or an SMTP plugin.
Yevhenii Odyntsov
Content @Mailtrap

Best 8 WordPress Transactional Email Plugins Reviewed
On January 09, 2026
9min read
We've picked eight great plugins for sending transactional emails in WordPress. Learn more about their features, integration options, and price tags.
Yevhenii Odyntsov
Content @Mailtrap

BIMI: the New Word in Email Authentication
On December 19, 2025
7min read
BIMI authentication is a brand new weapon against spoofing. Are you curious about how it works? We’ve got everything covered for you.
Oleksii Ianchuk
Product Lead @ Mailtrap

What is an Email API?
On July 23, 2025
10min read
Learn what an email API is, how to use it, and why you need it for both side and major projects, all in this article.
Dzenana Kajtaz
Technical Content Writer @Mailtrap
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