Warmup Inbox

Warmup Inbox

5.0 out of 5 stars
Duobox Warmup Inbox

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Duobox:

About

Duobox is hosted business email for small teams that want to use addresses on their own domain. It provides personal and shared inboxes such as sales@, support@ and billing@, with shared message history and access for multiple team members. Users can connect a domain they already own or register one through Duobox, then create inboxes, aliases and forwarding rules. The service includes up to 10 inboxes of 50 GB each per person and supports additional domains. Teams can access mail in a web browser or configure a phone's mail app. Duobox also offers an MCP connection for clients such as ChatGPT, Claude and Cursor, using OAuth and configurable permissions to read mail, save drafts, send messages, or manage the team, plan and inboxes. A free tier includes one person, one inbox, one domain and 10 GB; additional people cost $2 per month each.
Warmup Inbox:

About

Warmup Inbox automatically raises your email sending reputation through our network of inboxes that talk to each other. The process of preparing an email address for general use or email outreach is commonly referred to as “Warming Up” an inbox, where you take a number of steps to ensure that an email address does not become deactivated, blacklisted, or automatically marked as spam when it begins to send outgoing messages to other recipients. This process is typically done with newly created email addresses but also benefits older email addresses who have been having issues with email deliverability, in that a noticeable portion of their outgoing mail is either landing in a spam folder or blocked entirely by an email server due to either being blacklisted or associated with a domain that has a poor reputation. Warming Up an email inbox essentially is recreating the way a typical person will use an email address.
Duobox:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
Warmup Inbox:

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported
Duobox:

Audience

Small companies and teams that want email on their own domain, with shared inboxes like sales@ and support@, and teams that want their AI agent to work in that inbox.
Warmup Inbox:

Audience

Businesses looking for an email deliverability solution
Duobox:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
Warmup Inbox:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
Duobox:

API

Offers API Supported
Warmup Inbox:

API

Offers API Supported
Duobox:

Screenshots and Videos

No images available
Warmup Inbox:

Screenshots and Videos

Duobox:

Pricing

$2/person/month
Free for one person, one inbox, one domain and 10 GB, with no card required. Paid access is $2 per added person per month in US dollars, with no contract; each person can have up to 10 inboxes of 50 GB each. The first domain is included; each additional domain costs $5 per month for hosting, and domain registration is charged separately by the registrar.
Free Version Supported
Free Trial Not Supported
Warmup Inbox:

Pricing

$19 per inbox per month
Free Version Not Supported
Free Trial Supported
Duobox:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software
Warmup Inbox:

Reviews/Ratings

Overall 5.0 / 5
ease 4.7 / 5
features 4.7 / 5
design 4.7 / 5
support 5.0 / 5
Warmup Inbox:

Pros & Cons from Real Users

Pros

  • Easy to use and effective in warming up email accounts. We use a few different emails and they all work better with Warmup Inbox.
  • -Improved Email Deliverability -Automations -Provides detailed analytics -Great customer support -User-friendly
  • WarmupInbox really improved my domain reputation with several ESP. I tested with several custom ramp-up frequencies and the independent tools I use to monitor my domain health showed improvements.

Cons

  • Cost can get high if you use multiple Pro accounts.
  • -Occasional bugs: Even though the filter has been setup, sometimes the warmup emails still go straight to our inbox
  • First time setup wasn't the most simple but once you've done it once, it's very easy to use.
Duobox:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
Warmup Inbox:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
Duobox:

Company Information

Duobox
Founded: 2026
Argentina
duobox.io/en
Warmup Inbox:

Company Information

Warmup Inbox
www.warmupinbox.com
Duobox:

Alternatives

No Alternatives
Warmup Inbox:

Alternatives

InboxAlly

InboxAlly

4.7 out of 5 stars
Warmup Inbox:
E-Warmup

E-Warmup

5.0 out of 5 stars
Warmup Inbox:
LiftInbox

LiftInbox

Unique Technologies
Warmup Inbox:
Duobox:
Warmup Inbox:
TrulyInbox

TrulyInbox

1.0 out of 5 stars
Duobox:

Categories

Email Hosting Supported
Warmup Inbox:

Categories

Email Warmup Supported
Warmup Inbox:

Email Deliverability Features

Deliverability Alerts Supported
Deliverability Reporting Supported
DMARC Analytics Supported
Email Address Verification Not Supported
Email Content Testing Supported
Email Previewing Not Supported
Inbox Placement Testing Supported
IP Blacklist Monitoring Not Supported
Reputation Reporting Not Supported
Duobox:

Integrations

Amazon SES Not Supported
ChatGPT Supported
Claude Code Supported
Cursor Supported
Gmail Not Supported
Google Workspace Not Supported
Mailgun Not Supported
Microsoft 365 Not Supported
Microsoft Outlook Not Supported
Model Context Protocol (MCP) Supported
SMTP Provider Not Supported
SendGrid Not Supported
SendPost Not Supported
Yahoo! Mail Not Supported
Zoho Mail Not Supported
Warmup Inbox:

Integrations

Amazon SES Supported
ChatGPT Not Supported
Claude Code Not Supported
Cursor Not Supported
Gmail Supported
Google Workspace Supported
Mailgun Supported
Microsoft 365 Supported
Microsoft Outlook Supported
Model Context Protocol (MCP) Not Supported
SMTP Provider Supported
SendGrid Supported
SendPost Supported
Yahoo! Mail Supported
Zoho Mail Supported
Duobox:
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Warmup Inbox:
Claim Warmup Inbox and update features and information
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