UniOne Blog

Blog
For beginners
How to Warm Up Email Domain: The Complete Guide to Better Deliverability
Tips and tricks of warming up your sending domains for better email deliverability.
Valeriia Klymenko
23 july 2026, 10:0815 min
How to Warm Up Email Domain: The Complete Guide to Better Deliverability
Valeriia Klymenko
23 july 2026, 10:0815 min
Delivery & Inbox Placement: Why Your "Delivered" Emails Are Secretly Hitting Spam
Andrew Dyuzhov
09 july 2026, 12:2210 min
How to Send Email with SMTP: Proven Methods
Yurii Bitko
07 july 2026, 23:395 min
Email Protocols Explained: SMTP, IMAP, and POP3
Alexey Kachalov
30 june 2026, 21:357 min

Recently published

Blog
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Top 7 Mailtrap Alternatives
We reviewed the top ESP alternatives to Mailtrap. Find out which email service provider is better suited for your business.
Valeriia Klymenko
31 october 2024, 11:12
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Top 11 Constant Contact Alternatives
We reviewed the top ESP alternatives to Constant Contact. Find out which email service provider is better suited for your business.
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24 october 2024, 10:30
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Host Your Own SMTP Server Or Use a Provider: Which Is Better for You?
Decide whether to host an SMTP server for your marketing campaigns in-house or use a provider. Compare one-time and recurring expenses to settle on the best email solution for your business needs.
Vitalii Piddubnyi
17 october 2024, 10:34
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14 Best Mailchimp Transactional (Mandrill) Alternatives
Find the right Mailchimp Transactional alternative for transactional emailing to scale your email capabilities with a more affordable service. Check out these 14 Mailchimp Transactional competitors in our roundup.
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19 september 2024, 11:44
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10 Best ActiveCampaign Alternatives for Businesses
ActiveCampaign is a well-known email marketing platform, but not necessarily the best choice for anyone. We review 10 best alternatives to ActiveCampaign for each type of business.
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12 september 2024, 11:31
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8 Best Brevo Alternatives For Exceptional Transactional Email Delivery
Description: Choose the right Brevo alternative for transactional emailing and scale your email capabilities, without worrying about the cost of the service. Check out these Brevo competitors.
Denys Romanov
05 september 2024, 13:11
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14 Best SendGrid Alternatives for High-Volume Emails
Choose the right SendGrid alternative for your business and scale your email infrastructure with a reliable service for transactional emails.
Vitalii Piddubnyi
27 august 2024, 13:00
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The Secrets of E-Mail Surveys
By performing email surveys, you can receive valuable information from your customers. Check out our guide on email surveys and start getting important feedback!
Valeriia Klymenko
23 august 2024, 13:26
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For beginners
Email Formatting: Examples & Best Practices for Success
Learn the ins and outs of email formatting with practical examples and top-notch strategies for achieving success in your email communications.
Valeriia Klymenko
06 august 2024, 10:29
Blog
For beginners
Email Marketing KPIs: A Guide to Success
Discover key performance indicators (KPIs) that will help you achieve optimal results in your email marketing campaigns. Our advice will enable you to pave the way to success.
Alexey Kachalov
02 august 2024, 12:56
Blog
For beginners
How to Secure Your Emails with ARC
Authenticated Received Chain (ARC) strengthens email security and ensures delivery by verifying integrity of relayed messages. Learn how ARC works and how it benefits your email delivery.
Alexey Kachalov
30 july 2024, 14:10
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For beginners
A/B Email Testing Guide: Optimize Your Campaigns for Success
Master A/B testing to craft high-performing email campaigns that boost engagement, conversions, and ROI. Discover strategies, tips, and tools for email A/B testing success.
Denys Romanov
26 july 2024, 10:36
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For beginners
CTR in Email: What Is It and How To Increase It
How effective is your email marketing campaign? The click-through rate (CTR) is a crucial indicator of its effectiveness. Learn what CTR is and how to improve it.
Alexey Kachalov
19 july 2024, 10:14
Blog
For beginners
Email Throttling: The Essence, Meaning and Methods
Learn what causes email throttling and how to prevent it. Read our recommendations on avoiding email throttling and improving your deliverability.
Vitalii Piddubnyi
16 july 2024, 08:08
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For beginners
Buying Email Lists: A Recipe for Disaster
Learn why buying an email list is a bad idea and master healthy ways to get email lists for your marketing campaign.
Denys Romanov
12 july 2024, 11:29
Blog
For beginners
SEO and Email Marketing: How Combining Both Boosts Search Engine Ranking
Boost your website's Google ranking by combining the power of SEO with email marketing. Learn how to use these strategies together in a few simple steps!
Yurii Bitko
18 june 2024, 11:56
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For beginners
Best Practices for Email List Hygiene
Email list hygiene involves keeping your mailing list clean and accurate. Learn the best practices for cleaning your email list to achieve your email marketing goals!
Valeriia Klymenko
11 june 2024, 11:00
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For beginners
How To Send a Link by Email
Want to share links with friends, family or colleagues by email? Our guide will help you discover the right way of sending links by email.
Vitalii Piddubnyi
04 june 2024, 15:52
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For beginners
Webhook vs. API: What’s the Difference
An API allows software applications to communicate with each other through requests. Webhooks, acting as a streamlined API, facilitate one-way data sharing triggered by events. Learn how to choose the right one for your needs.
Valeriia Klymenko
17 may 2024, 12:58
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Best Ready-to-Use Feedback Email Templates
Master the art of crafting effective review request emails with our ready-to-use templates. Learn how to request customer feedback like a pro!
Valeriia Klymenko
22 march 2024, 11:11
Blog
For beginners
Best Review Request Email Examples And Free Templates
How to get customer reviews and request reviews from your customers? Explore our review request email examples and expert tips for crafting personalized messages to get customer feedback.
Denys Romanov
15 march 2024, 12:24
Blog
For beginners
What Is Email Spoofing?
Protect yourself from email spoofing with our expert insights. Learn about the definition, examples, and essential tips to safeguard your inbox from this deceptive threat.
Yurii Bitko
12 march 2024, 15:45
Blog
For beginners
What is a DNS SPF record?
SPF records are a type of DNS TXT record used for email authentication. Learn how to set up an SPF record to protect your email identity.
Vitalii Piddubnyi
27 february 2024, 15:42
Blog
For beginners
How to End an Email Professionally
Learn the best ways to conclude an email for both business and casual communication with our personalized email sign-offs and check out examples of email closings to avoid.
Valeriia Klymenko
21 february 2024, 07:02
Blog
For beginners
What’s an SMTP Relay Service
SMTP relay service delivers outbound emails in bulk. Find out in the UniOne guide what SMTP relay is, why this is important, and how it works with email.
Denys Romanov
13 february 2024, 12:17
Blog
For beginners
Cold Email Marketing 101
Cold Email marketing may be a useful tool for your business purposes if used correctly and legally. We describe the best strategies and regulations related to cold emails.
Alexey Kachalov
02 february 2024, 08:15
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For beginners
How to Whitelist an Email Address in Gmail, Outlook, Yahoo, and More
Learn what whitelisting means and how to make sure that your incoming important emails never hit the spam folder.
Vitalii Piddubnyi
30 january 2024, 12:08
Blog
For beginners
Is Cold Emailing Illegal?
Sending a cold email to a commercial recipient is not illegal in most jurisdictions, but such campaigns must abide by certain rules. Here’s the rundown on all cold emailing laws and compliance tips.
Alexey Kachalov
26 january 2024, 13:54
Blog
For beginners
What is DKIM and How to Add a DKIM Record
Domain Keys Identified Mail (DKIM) protects your company from email spamming and phishing attempts. It provides a method for validating a domain name identity associated with a message through cryptographic authentication.
Valeriia Klymenko
19 january 2024, 09:28
Blog
For beginners
What is a DNS MX record?
Learn about DNS MX records: what they are, why they are important, and how they work. Learn more about Mail Exchange (MX) records and how they are used in the email-sending process.
Alexey Kachalov
15 december 2023, 12:35
Blog
For beginners
How To Choose the Best Font for Email?
Want to improve the quality of your professional or marketing emails? Good-looking fonts are what makes an email design engaging. Learn all about the best font for emails in this guide.
Alexey Kachalov
16 november 2023, 11:26
Blog
For beginners
Best Email Signature Examples
How to make a professional email signature? Here are the best email signature examples that you can use in your email communications
Valeriia Klymenko
13 november 2023, 07:45
Blog
For beginners
How to Send Mass Email Campaigns in Outlook: Step-by-Step Guide
Learn how to send bulk emails using Outlook and why you may have to opt for an alternative.
Alexey Kachalov
25 october 2023, 14:38
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Email Security: Common Issues and Best Practices
Everything you need to know about email security and how to make your email server protected from the most common threats.
Valeriia Klymenko
18 october 2023, 15:12
Blog
For beginners
What Is DMARC in Email?
DMARC is an email validation system designed to protect a company’s email domain from being used for email spoofing and phishing scams. Learn why a DMARC record is important and how it can improve your campaign's email delivery and avoid spam folders
Yurii Bitko
13 october 2023, 12:27
Blog
For beginners
What is SPF (Sender Policy Framework)?
SPF (Sender Policy Framework) is an email authentication system that allows you to determine which mail servers are allowed to deliver email messages for a specific domain.
Vitalii Piddubnyi
12 october 2023, 10:59
Blog
For experts
How to Calculate Email Open Rate
What are email open rates? And how do you calculate them? In this article, we'll share a simple way and why it's important to know your email open rate.
Yurii Bitko
04 october 2023, 14:00
Blog
For experts
Email Obfuscation: Which Methods are the Best?
Learn the ways to obfuscate your email address, hiding it from spammers. Does email obfuscation really work? Different approaches to email obfuscation.
Alexey Kachalov
20 september 2023, 09:20
Blog
For beginners
What is Email Bounce Rate and How to Keep It Low?
In our article, you will learn what the email bounce rate means, how you can reduce this rate and its impact on your marketing campaigns
Valeriia Klymenko
15 september 2023, 13:08
Blog
For beginners
Why is Gmail Blocking My Emails and What To Do About It
Learn why Gmail may be blocking your email, and how to fix the problem and improve your email deliverability.
Yurii Bitko
12 september 2023, 08:48
Blog
For beginners
B2B vs. B2C Email Marketing: How Do They Differ?
What's the difference between B2C and B2B email marketing? Buyer behavior, length of the buying cycle, content - learn the differences and use them more effectively. Read about it in our article.
Valeriia Klymenko
06 september 2023, 14:56
Blog
For experts
How To Reduce Spam Complaint Rate | UniOne
When sending emails to contacts, you may sometimes receive spam complaints. These complaints can harm your sender reputation and put your customer relations in danger.
Yurii Bitko
01 september 2023, 13:44
Blog
For beginners
Email Delivery Failure: Why Didn’t Customers Receive Your Email?
Avoid email delivery failures by learning about their most common causes. Tips on how to deal with delivery failures, bounces and other issues.
Yurii Bitko
30 august 2023, 14:29
Blog
For beginners
What Is STARTTLS and How Does It Work?
Learn about the StartTLS, SSL, and TL protocols with Unione. What is the difference between these email security protocols and how to use them for security?
Valeriia Klymenko
24 august 2023, 08:22
Blog
For beginners
IP Warming: What Is It and Why You Need It
IP warm-up is how you establish a reputation for a new IP or an IP that hasn't been used for some time. Read about its best practices and why it's important.
Valeriia Klymenko
24 august 2023, 08:12
Blog
For beginners
Best Email Solution For Sending OTPs
How to choose an email solution for sending OTPs
Yurii Bitko
19 july 2023, 15:06
Blog
For beginners
One-Time Passwords: Authentication And More
More Than Just Authentication: 14 Ways To Use One-Time Passwords
Alexey Kachalov
19 july 2023, 13:56
Blog
For beginners
World’s Best Authentication Practices: One-Time Password (OTP)
World's best authentication practices: One-Time Password (OTP)
Yurii Bitko
19 july 2023, 11:51
Blog
For beginners
Smart Host – What Is It?
Smart Host is a server between an email sender’s and recipient’s servers. Read about SMTP smart host service and how it helps with email deliverability.
Alexey Kachalov
05 may 2023, 12:24
Blog
For beginners
REST API: How It Works, Its History, Benefits, and Common Challenges
REST API is an application programming interface. It conforms to the constraints of REST architectural style and allows for interaction with RESTful web services.
Valeriia Klymenko
27 april 2023, 17:15
Blog
For beginners
6 Ways Email Marketing Software Can Help Businesses Easily Reach the Right Leads
Reaching the right leads is very important for developing a business. In this article, we will show you 6 ways to do it through email marketing software.
Yurii Bitko
17 march 2023, 09:43