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Best Microsoft Outlook Alternative: Outlook vs Aerosend

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Over the past few months, Outlook inboxes have been dying faster. Reply rates are dropping, spam hits are rising, and cold emails are struggling to reach inboxes. One of the best alternatives to Microsoft Outlook for cold email and high deliverability is Aerosend, and the main difference between Outlook and Aerosend is what they are […]

2026 Email Deliverability Guide: Best Tools and Tips to Land in Every Inbox

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What is email deliverability and why does it matter?  Email deliverability is the percentage of your messages that reach the inbox instead of landing in spam or promotions. Delivery only means the mail server accepted your email. Deliverability means people could actually see it. It is not the delivery rate you see in dashboards; that […]

How to Send a Follow up Email After No Response?

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You’ve written thousands of cold emails, sent them, and now you’re playing the waiting game. Except you’re the only one that’s playing it. Your leads? Not so much. We know that you’re probably wondering what about your copy made them not respond, and what you can do in your follow up so they will, in […]

Aerosend vs Smartlead vs Instantly

Three feature comparison cards for Instantly, Smartlead, and Aerosend

To send cold emails that will land in the inbox, you need two things: Inboxes – Email accounts your cold emails are sent from. Automation Software – This software helps you manage multiple inboxes and automate sending, so you don’t have to do it manually. Together, they help you send cold emails that book meetings. […]

Automated vs Manual Cold Email

Robot facing off against an email envelope with "Vs" in between

Cold emailing is one of the biggest ways to generate revenue, even in 2025. The question is whether you should be automating the whole process or do it yourself. The answer is you should do a mix of both, and we’re going to tell you how to do exactly that in this blog. Why This […]

Scale Your Outreach: Using Bulk Cold Email the Right Way

Robotic arm placing emails onto a conveyor belt with gears

You love the cold emailing concept, maybe you’ve also sent a few. Now, you want to scale up, send more bulk cold emails, get more leads, more replies…but you’re not sure how. Don’t worry, you’re in the correct corner of the Internet. We’ll break down everything, including setup, bulk cold email sending limits, segmenting lead […]

13 Cold Email Mistakes To Avoid in 2026

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Introduction Everyone makes cold email mistakes. That’s not the problem. The problem is making the same ones twice. Especially when the cold email landscape in 2026 is less forgiving than ever. Google and Yahoo’s bulk sender requirements have raised the floor. Inboxes are smarter, prospects are colder, and yet, cold email is still one of […]

Cold Email Deliverability Infrastructure for Agencies

Building with shields, domain cards, and an upward trend chart

Cold Email is your bread and butter. We understand that because it’s ours too. At the end of the day, every booked meeting is additional revenue and directly impacts client retention. You spend money creating campaigns and building lead lists to achieve a consistent flow of replies. That’s what your clients trust you to do. […]

What is Aerosend?

Server stack with interlocking gears, a shield, and a trend chart

We’re an inbox provider built for cold emails.  To make cold email successful, you need to send very few emails from 1 domain (60-75 emails/day/domain). To scale automated outreach, you need multiple domains and inboxes working together. This helps providers think you are not doing mass outreach, and your emails will land in the inbox. […]

What are Gmail’s Daily Email Sending Limits per day in 2026?

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Gmail is the most popular provider. But should you use it for cold email? If you’ve found yourself in the midst of the “you have reached a limit for sending mail Gmail” notification, you’ve likely reached the Gmail sending limit. Gmail sending limits are 2000 on paper. For cold emailers, it’s 25 per inbox. A […]

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How to Get Your Instantly API Key
Step 1 : Log in to Your Instantly Account
Go to https://app.instantly.ai/auth/login and log in to your account
Step 2 : Navigate to Settings

Click on your profile icon in the bottom-left corner, then select “Settings” from the dropdown menu.

Step 3 : Select Integration

In the Integrations page, click on the “API Keys” tab in the left sidebar.

Step 4 : Get Your API Key with all:read Scope

If you already have an API key with the all:read scope, you can use that key.


If not, click the “Create API Key” button, select the all:read scope, and make sure to save your new API key somewhere safe.

How to Get Your Smart Lead API Key
Step 1 : Log in to Your Smart Lead Account
Go to https://app.smartlead.ai/login account and log in to your account
Step 2 : Navigate to Settings

Click on the “Settings” option in the top right corner profile icon.

Step 3 : Select API Integration

In the Settings page, under your profile picture, you can see the SmartLead API Key.

Step 4 : Generate Your API Key

If you already have an API key displayed, you can use that key. If not, click the “Generate API Key” button to create a new one.