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Best Outlook Alternative for Agencies: How Sparklead Scale Cold Outreach with Aerosend

Outlook and Aerosend logos on opposite sides of a balance scale

Overview Founded by Alexan Zartarian, Sparklead is a B2B lead generation agency that helps companies across industries generate qualified sales appointments through cold email outreach. The team runs campaigns for clients in multiple sectors, focusing on scalable systems that drive predictable meetings and revenue growth. When Spark lead first started, Alexan handled everything directly, experimenting […]

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 […]

ZapMail Alternative: How RevGenius Found Stability with Aerosend

ZapMail to Aerosend migration arrow with a monitor and RevGenius logo

Overview Jared Robin, founder of RevGenius, runs one of the largest and most engaged communities for revenue professionals worldwide. Between managing partnerships, events, and a thriving member base, Jared also oversees the operational side of RevGenius, including outreach, community emails, and deliverability. Like many operators in fast-moving B2B spaces, he had tested multiple email infrastructure […]

Domain Reputation Monitoring: How to Improve Email Deliverability

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Why Do You Need Domain Reputation Monitoring? You’ve crafted the perfect message. The audience is right. The content is clean and compliant. And yet, the emails quietly slip into spam or never show up at all. That’s not bad luck. That’s bad domain reputation. Many assume deliverability issues come from low-quality lists or overused templates, […]

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 […]

How to Monitor Email Deliverability?

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Most cold emailers think “delivered” means “in the inbox.” It doesn’t. Real-time email deliverability monitoring is one of the strongest metrics that will lead to conversions. The way it works is simple: When you monitor email deliverability, you get a clear picture of how your campaign is performing and any potential deliverability holdups. In here, […]

What No One Tells You About Cold Emails Going to Spam

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In the cold emailing world, a lot of the emails probably deserve to go to spam…but the one that you put a lot of effort into crafting and getting a good lead? They sure don’t. So, if you’re wondering why your emails are going to spam, you’re not alone. In this article, you’ll learn why […]

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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.