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Deliverability

Free access to advice on deliverability, cold emailing and more.

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LATEST ARTICLES

How to Avoid the SPAM Folder?

When you send out an email, it goes through a series of SPAM-filtering tests that determine whether it will be let through to the inbox. And sure, this doesn’t really stand in the way of your email getting through when you want to just grab a coffee with friends (unless there’s 500 of them and you’re emailing them all at once with the same message), but it might prove problematic when you’re reaching out to prospects or clients and your messages keep being mistaken for SPAM. See how to make sure your emails are getting exactly where you want them to - to the contact’s main inbox.

How to Set up a Domain and Mailbox for Cold Outreach?

When you’re getting ready to start sending cold emails, the first thing you should do is set up a separate domain and mailbox that you’ll use only for cold outreach. This is a necessary step mainly for your domain’s safety reason, but also it allows you to handle the responses from prospects more effectively because they won’t mix with other business emails you receive. So without further ado, here's a nutshell guide on how to correctly set up a separate domain and mailbox for cold emailing.

How to Check & Improve Your Domain and Email Server IP Reputation?

I bet you want your emails to get to your ideal prospects' inboxes. To make sure they will, you need to take care of your deliverability. Among many factors that affect the deliverability, the reputation of your domain and your email server IP plays a tremendous role. Do you know what actually affects the reputation? Do you know how to check the reputation, control it, or improve it? Read on to find some answers and helpful tools.

How & When to Test Email Deliverability? List of Tools & Alternatives

Are you taking good care of your cold email campaigns’ delivery rates? There are a few tools our team uses to help Woodpecker customers test email deliverability and improve it. In this post, we share this list with you and explain how & when you can use email deliverability tools by yourself.

What is DNS? How Does It Work? – Short Guide for Beginners

Are you worried you won’t get what DNS is all about because you’re not a tech-savvy person? Well, neither am I. It’s for other people like me that I did my best to get to the bottom of this topic and explain it in plain English, as simply as possible. So set your worries aside and dig in.
What are sending limits of various email providers?

Email Sending Limits in 2026: Gmail, Outlook & 8 Providers Compared

You have to know this. Especially if you do email outreach. Each email service provider has its own email sending limits. The limits may be daily, hourly, and sometimes also per minute. If you’re sending cold email campaigns without being aware of your email provider’s limits, your email account may get blocked before you know it.

Links in Cold Email: How to Add & Track Them Safely (Updated)

Do you have links in your cold emails? I bet you do. We often feel the need to add a link or two – either in the body of our email or in the signature. Moreover, we usually want to know if someone clicked the link or not. Ideally, we would like to know how many people clicked the link and who it was exactly. There are many tools that allow us to track clicks on links in emails, but all of them use the same mechanism to do that. Unfortunately, the mechanism is not perfect, and it may cause spam alerts if we set up our links wrong. That's why it's important to put in the links properly into our message not to get into spam folder. Here's how to do that.

15 Things You Need to Know About Domains Before Running a Cold Email Campaign

You may already know why you should warm up a domain before hitting the ‘send’ button and how to do it, and what to do when your domain reputation has gone downhill. But to clear any doubts that may still arise in the curious minds of cold email senders, I thought it’d be a good idea to collect the most common domain questions that our users ask us. So, without further ado, here they are – check out the answers to some of the most common domain questions.

FEATURED ARTICLE

15 Things You Need to Know About Domains Before Running a Cold Email Campaign

You may already know why you should warm up a domain before hitting the ‘send’ button and how to do it, and what to do when your domain reputation has gone downhill. But to clear any doubts that may still arise in the curious minds of cold email senders, I thought it’d be a good idea to collect the most common domain questions that our users ask us. So, without further ado, here they are – check out the answers to some of the most common domain questions.