Automate your Sales Pipeline

Cold Email Software

Send cold emails while protecting your sender reputation

mailrush Overview

B2B Cold Email Software
and Email Service Provider

We help businesses integrate Email Marketing channels for customer base growth. We do this by automating best practices for sending Email Marketing and providing effective tools and metrics for long term outreach campaigns.

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Why Choosing

Sales teams around the world are using Cold Email Tool to grow their Customer Acquisition. Our software is a complete suite of prospecting tools, email validation, and automating B2B cold email marketing campaigns. Here is a comprehensive list of the most relevant features.

Outreach Email Server included
Automate Email Follow up and Drip Sequences
Email Sending Reputation Control
Webhooks for Real-Time integrations
Email List Validation
Shared IP or Dedicated IP Options
Customizable Email Template Builder
Content spinning (Spintax) for text variety

Leverage an Email Outreach Strategy

Email Marketing provides the best ROI for Customer Acquisition. provides businesses a single dashboard to manage their Email outreach campaigns and automating best practices for effectiveness when sending cold emails. Try our Cold Email Software today!

Free for 14 days
No credit card required
Automate Cold Emails
Sending tool dashboard

Track Performance Indicators

Visualize data insights to understand your outreach campaign's dynamics with performance indicators: Delivery Rate, Open Rate, Click Rate, Reply Rate, and Bounce Rate.

  • Track Delivery Rates
  • Track Open Rates
  • Track Click Rates
  • Track Response Rates
  • Track Bounce Rates
  • Identify Invalid Emails
Free for 14 days
No credit card required
Email Tracking
Email Marketing Metrics

Email Warming

Automate Engagement to increase your reputation.

Improve Email Deliverability by automating positive engagement actions. It prevents emails from landing in the spam box. Visualize how your emails are reaching Gmail and G Suite.

Free for 14 days
No credit card required
Improve Email Deliverability
Mail Warm

Email Follow up

Send Email reminders that improve response rates.

Create drip sequences for your email marketing campaigns and cold email follow ups with our drag and drop tool for building event-based email automation.

Free for 14 days
No credit card required
Follow up automation
Follow up automation

How Does it Work?

If you have a registered domain name and an email address, you are almost set.


Link Your Domain Name

We will supply you with a set of DNS records that you will need to enter for your domain. MailRush provides a DNS validation tool for verification of the setup.


Start a Campaign

Import CSV files with your leads, Validate the list to avoid invalid emails, personalize your email template, set sending cadence, schedule and, start sending.


Send an Email Follow up

Create an email follow up sequence that will send on later days. The automation will stop if you get a reply or any other email event you want to track.

What makes us different?

More than a tool to send sales emails, provides Email Services, Prospecting Capabilities, and Email Automation in a single solution.

Cold Email Tool

We are continuously enhancing our Email Automation tool with practical features. You can automate outreach campaigns, track email opens, replies, and other metrics, and send automated email follow ups that are event-driven.

Email Service Provider

Our parent company, Cyber Cast Intl, is the data center provider that operates the IP addresses, Email Servers, and the entire ecosystem.

Integrations currently integrates with the following software.



With our integration for WordPress, you can enable your website with subscription forms.

By integrating with, you can create real-time dashboards to centralize all events as they happen in our email marketing platform.



Integrate with PipeDrive, HubSpot, Salesforce and other thousands of software. Export opens, clicks and replies events as they happens. Import contact to campaigns from your CRM to MailRush.

How do we compare to more traditional software?

We compare the most common choices for cold email software and we do a com of their features.

mailshake gmass mailrush
Focus It is an email sending tool. It is an email sending tool extension for Chrome. Focused on deliverability and best practices. We are an Email Service Provider that allows Cold Outreach by using our Email Sending Tool.
Free Trial No Yes Yes
Demo Yes No Yes
Use Your Domain Name Yes Yes Yes
Support & Training
24x7 Live Chat No No Yes
24x7 Technical Support No No Yes
Free Training Yes No Yes
Email Copy
Content Spinning (spintax) No No Yes
Drag & Drop Email Template Builder No No Yes
Copy Personalization Yes Yes Yes
Spam Checker Yes No Yes
Email Tracking
Open Tracking Yes Yes Yes
Click Tracking Yes Yes Yes
Replies Tracking Yes Yes Yes
Email Deliverability KPIs
Email Sender Score No Yes Yes
Provider Feedback loop No No Yes
Email Sending Facilities
Includes SMTP Server No No Yes
Dedicated IP Option No No Yes
Email Authentication Setup (SPF, DKIM, DMARC, PTR) No No Yes
Email Volume Depends on added paid users and your external SMTP or Gsuite you bring. Depends on added paid users and your Gsuite. Depends on warm up and account performance.
Email Warming and Anti-Abuse
Automated Email Warming process No No Yes
Automated Engagement on Gmail/G Suite No No Yes
Anti-abuse protection No No Yes
Email Automation
Drag & Drop Email Automation No No Yes
Email Follow up and Drip Sequences Yes Yes Yes
Campaign Scheduling Yes Yes Yes
Email Volume Throttling Yes No Yes
A/B Test Yes No Yes
Find Emails from Linkedin Sales Navigator No No Yes
Validate Emails No No Yes

Frequently Asked Questions

What are common use cases?

In general, if you do B2B cold email outreach, is for you. Some everyday use cases are:

  • Digital Marketing Agencies: Use cold email for promoting SEO services, Link Building, Social Media, and others.
  • Saas Providers: Cold Email is key for SaaS operators and targeting new customers. So, Use cold email to reach more prospects and to automate drip sequences and follow ups.
  • Animation Studios: Pitch to website owners to increase sales.
  • HR and Recruiters: Target the correct person for a company position by using cold email.
  • E-commerce: Reach more prospects by using cold email and drip campaigns.
  • Awareness: Organizations can use cold email outreach to generate awareness about a product, service, webinars, events, conferences, and other related offerings.

What are the requirements to get started?

Here is a list of the minimum requirement to use MailRush.

  • Domain name: You need to own a domain name. It could be any extension (.com, .net, etc.). You will also need access to the DNS Manager as we need a few DNS records in your domain DNS for integrating with your domain name.
  • Google Workspace or a web hosting account: will provide you with the email servers to send outreach campaigns. In addition to the MailRush email server, you will need a Google Workspace account or a web hosting account to receive replies from potential customers. will not use your Google Workspace account or Web Hosting server to send outreach emails.

How does the email warming service work?

There are two components in our email warming automation.

  • Ramping up the daily sending volume: It will gradually increase the number of emails you can send in a day. Consequently, at the early stage of the account, the daily sending limit will be low, and it will increase as the account ages to reach the advertised daily limit for the plan of your choice.
  • Engagement Credits for Mail Warming: The system automates sending emails to a seed list on multiple providers to create positive actions and improve engagement levels. Subscription to the email warming service starts at 15 USD for 10 emails a day to our seed list.

How does the email follow up automation works?

We provide an easy-to-use drag and drop interface for the creation of email sequences. It gives you a visual aid to understand the organization of email automation. The email sequences get triggered depending on events. The events may include conditionals for tracking responses, tracking when a contact opens an email or when a contact clicks on a link. It is an excellent solution for sending email reminders, and it helps improve conversions.

What is not will not perform well for the following activities.

  • If you want to send a large number of emails at the early stage of the account without a warm up process.
  • If you expect a high frequency of email going out without any restriction or abuse/reputation control.
  • If you plan to send B2C email outreach campaigns.

How is Email Deliverability?

Email Deliverability is complex, and it depends on multiple factors, including but not limited to:

  • Email Account Warm up: All accounts need to get warmed up to build a reputation and perform better for inbox placement.
  • Domain name age: New domains are required to build a sending reputation.
  • Sending IP Address: The IP address needs to be warmed up to build a sending reputation. We suggest a dedicated IP for having more control over the sending reputation of the IP address assigned to your account.
  • List hygiene: High bouncing rate will result in a poor sending score.
  • Contact list: Your contact list needs to be well researched and relevant to your email copywriting.
  • Email Cadence: Space out your emails to avoid overwhelming a provider with connections.
  • Content Rotation: Do not send the same content over and over. Use Email Personalization in addition to rotating the content.
  • Seed List: Use an email seed list to generate engagement and positive activities.
  • Follow Anti-Spam regulations: Providers will check if you comply with international anti-spam regulations. Personalize your email content, give the user an option to unsubscribe, and add your email signature with your address.
  • Email Copywriting: Be conversational when creating your email templates; avoid click-baits and large email content.
  • Email Volume: Send a suitable number of emails and scale up the volume over time. Do not overwhelm providers with connections. Keep your email volume low at the early stage of the account.
  • Track Mail Deliverability Reports: Track and comply with the warnings received from email providers.
  • Sending Hours: Set a time frame when you want to send emails. Do not send emails 24x7.
  • Track Deliverability KPIs: Monitor your MailRush KPIs (Feedback Loop and Reputation Center) to adjust your campaign. Monitoring will help you to overcome blocks imposed by providers and improve inbox placement.
  • Track Inbox Placement in all providers: Track how your emails reach multiple providers, trial and error possible deliverability problems.
  • Click to Action: Make use of a clear and unique click-to-action to increase the conversion rate. Don't saturate your cold email template with multiple links.

When using MailRush, if you run a healthy cold email outreach campaign, your performance indicators will be good. We offer automation for many of the best practices, but inbox placement takes time and effort.

What is the difference between shared IP and dedicated IP?

The difference relies on having control over the sender's reputation.

  • Shared IP: When using an SMTP with shared IP, your campaign will inherit the reputation of all the domains using that IP.
  • Dedicated IP: When using an SMTP with a dedicated IP, you are the only user using the IP. A Dedicated IP allows you to build a sender reputation that should perform well in long-term cold email campaigns.