Crafted to enhance B2B and B2C response rates

Enhance your outreach efforts with a top-of-the-line email tool designed to seamlessly cycle through ESPs, SMTPs, and domains, resulting in higher open rates, clickthroughs, and customer engagement.

Try Free Now


Features designed to generate more responses by spending less time on campaigns. Get more productivity with Auto warmup, Advanced email scheduling, and email sequencing

  • 01

    Mailboxes And SMTPs

    Add Gsuite, outlook, and 20+ SMTP servers Built-in SMTP and mailboxes rotation

  • 02

    Global Blacklist & Spamtrap

    Blacklisted and spam trap emails database with 3M emails Protect mailboxes/IPs/Domains from getting blacklisted

  • 03

    Campaigns & Lists

    Get opens, clicks, and responses from respective campaigns and lists. Import or export lists and templates.

  • 04

    Campaign Analytics

    Get granular analytics along with IP location of opens, devices, software agents, etc.

  • 05

    Auto Scheduling

    Most advanced auto scheduling that helps you gain reputation and generate more responses by delivering emails at the right time.

  • 06

    Auto Warmup Strategy

    Predefined auto warmup schedules keeps you safe from getting blacklisted and helps you to define your own warmup strategy.

  • 07

    Reply Tracker

    Add as many mailboxes to track replies/responses from your prospects and keep yourself updated of the total unique responses.

  • 08

    Email Sequences

    Send follow-up emails based on opens, clicks on specific links, and responses. Enjoy unlimited email sequencing.

  • 09

    Built-In SMTP

    Run unstoppable cold campaigns. Designed SMTPs with dedicated rotating IPs to efficiently execute cold emailing.

A cutting-edge algorithm with unparalleled sophistication

Sendcrux is a powerful tool designed to maximize success with cold emails. With its extensive experience and dexterity, you no longer need to purchase multiple mailboxes. Its domain and SMTP server rotation capabilities ensure the highest possible open rates, click-through rates, and responses. Make the most out of your cold emails with Sendcrux!

Unlock the Power of Sequencing with a Deeper Understanding

Engage your B2B and B2C customers simultaneously with targeted Sequences. Trigger personalized emails and follow-ups, based on list updates and email events, with our simplified Sequences tools. Gain deep insights into campaigns with detailed contact-level analytics and full tracking of customer activity. Make the most of every interaction, and experience professional results.

Optimize multiple campaigns and Sequences with
A/B Tests for unparalleled insights

Maximize the results of your email campaigns with Sendcrux. Our automated system uses A/B testing to determine the most effective email template and corresponding
subject line for each contact, ensuring your message is professional and on point. Make the most of your email outreach with Sendcrux.

Easing Into Cold Email With
Mailcrux SMTP's Help

Mailcrux offers organizations the cutting-edge power to engage in bulk emailing capabilities without any boundaries. Our server solutions guarantee efficient delivery so that messages can arrive to their intended destination in no time and with greater chances of reaching the inbox. Harness our SMTP servers to unleash the full potential of your communication goals.

A Dedicated IP / SMTP ensures that you maintain control and visibility of your sending reputation, rather than relying on the behaviour of your sending peers with a shared IP. This puts you in the driving seat and helps you create a strong and professional email image.

High Accuracy Rock-Bottom Price Super-fast Bulk Email Verifier

  • Improve Hit-Rate
  • Reduce Bounce Rate
  • Build Robust Sender Reputation

Getwriter harnesses the power of cutting-edge
Artificial Intelligence technology

OpenAI and ChatGPT Technologies

Offers a wide range of features to make content creation a breeze, such as automated text generation, image suggestions, and more.

More than 25+ Languages

With ChatGPT, users can create conversations in their preferred language, including English, Spanish, French, German, Italian, and Portuguese.

2FA Account Protection

Two-Factor Authentication (2FA) is an extra layer of security for your online accounts that requires two separate forms of identification.

Edit, Save, and Manage AI text Easily

Getwriter’s intuitive interface makes it easy to customize content to fit any brand’s style and tone.

Export Text Results in PDF & Word

Easily export text results in PDF and Word formats with just a few clicks.

Generate AI Images by Using Text

Generate AI images with natural language: Using natural language, you can generate AI images that have realistic features and textures

Getwriter harnesses the power of cutting-edge Artificial Intelligence technology

Our state-of-the-art AI technology leverages the power of Artificial Intelligence to give you a superior writing experience. Getwriter's cutting-edge algorithms ensure your writing is of the highest quality while enabling you to craft elegant, professional-grade content faster than ever before easily.

Unlock your potential and unlock Getwriter, the perfect way to make your words count.


Built-In Email Verification

All emails are verified before running the campaigns. Built-in email verification keeps your list always fresh.


CRM Apps

Bi-directional data flow from Zoho, HubSpot, and Salesforce. Use zapier to connect more apps


Web Integration

Embed web forms, and popups to collect prospects with every visit by initiating engaging email sequences.

  • Volume
    Per Day
  • 1-100 Emails
  • 100 - 300 Emails
  • 300 - 500 Emails
  • 500 - 10,000 Emails
  • 10,000 - 100,000 Emails
  • Above 100,000 Emails
  • Open Rate
    Per Domain/IP
  • Above 80%
  • 60% - 80%
  • 50% - 60%
  • 40% - 50%
  • 30% - 40%
  • 20% - 30%

Open Rate Guide

These are the estimated "Open Rate '' statistics for your cold campaigns with Sendcrux's built-in SMTP server for different volumes. Deliveribility gets impacted by number of emails sent daily according to ISPs spam policies. Use this guide to plan your optimal sending schedule.


  • none
  • Advanced Sequences
  • Gsuite,Office365 & Third Party SMTPs
  • Advanced Scheduling
  • Domain, SMTP & Mailbox Rotation
  • Auto Warmup
  • Contacts
  • Email Credits Per Month
  • Zapier Integration
  • Hubspot Integration
  • Zoho Integration
  • Web Integration
  • Blacklist Management
  • Advanced Email Template Builder
  • Segments
  • Invite Teams
  • Email Analytics
  • Global Spamtrap and Blocklist Database
  • Webhooks and API
  • Priority Support
  • Free
  • 5
  • 2000
  • 5000
  • Sign Up
    • Solo
    • 19
    • 10,000
    • Unlimited
  • Sign Up
    • Startups
    • 49
    • 25,000
    • Unlimited
  • Sign Up
    • Pro
    • 99
    • 50,000
    • Unlimited
  • Sign Up
  • Beginner


    USD / Month

    • Send 500 emails per day
    • One Dedicated IP
    • Dedicated SMTP server
    • Free IP replacement (If blacklisted)
    • 60$ Setup Fee
    • Delivery in 2 days


    USD / Month

    • Send 2000 emails per day
    • 2 Dedicated IPs
    • Dedicated SMTP
    • Free IP replacement (If blacklisted)
    • 60$ Setup Fee
    • Delivery in 2 days


    USD / Month

    • Send 5000 emails per day
    • 4 Dedicated IPs
    • Dedicated SMTP
    • Free IP replacement (If blacklisted)
    • 60$ Setup Fee
    • Delivery in 2 days

    Mailbox Price

    Price Starts from $7 per Month
    Note: Onetime setup fee $60 for multiple domains. Free setup for more than 20 mailboxes.

    Trusted by 3.6k+ Clients


    Eric Nowoslawski

    Growth EngineX

    I was blown away by how amazing the results were. I send 35,000 cold emails per week. No body in my circles is using a dedicated SMTP because they all believe it can't work or it's too expensive


    Mohit Sareen


    We never imagined sending millions of emails per month that just made possible by sendcrux’s team. What we are spending at sendcrux is negligible compared to what we did at other ESPs.


    Kimberly Fullwood

    Awesome REI, LLC

    Sendcrux has been amazing. The team has taken all of my email campaigns and is personally optimizing them and sending them out for us to our cold email clients.


    Brandon Hoffman

    KEA Advertising, Inc

    Sendcrux is doing an amazing job in cold email campaigns. We bought a dedicated SMTP with 4 IPs to send 40k emails/day and it is doing extremely well. Never witnessed IP or domain blacklisting issues.


    Balram Krishna


    We are into marketing and advertising, we need to reach decision-makers of various brands to sell our advertising offers. We were having multiple issues with cold email campaigns from several ESPs and CRMs. Sendcrux just did a great job by guiding us on sending cold emails.


    David Case

    We love sendcrux, especially their customer care and the way they take care of campaigns. Hired a campaign management expert along with dedicated SMTP from adcrux and saved many hours for sending cold emails.

    1604 Idlewild Ave,
    Green cove Springs, Fl-32043, USA

    Want to share any feedback with us, report a technical issue or just ask us a question? Feel free to contact us and we will get back to you shortly.