MailChannels Cloud

SMTP Relay Service

MailChannels Cloud is an email relay service that identifies spammers within your network to improve your email reputation and ensure reliable email delivery for your users. With MailChannels Cloud, you can eliminate email delivery problems caused by IP address blacklisting. You can also automatically shut down compromised end user accounts and scripts to improve your security. Unlike conventional email services, MailChannels Cloud is the only service that accepts 100% of your email, including spam.

Product Details

White Paper

Why Use an SMTP Relay Service?


White Paper

Lawfully Filtering Outbound Spam in the EU


Case Study

Read how Applied Innovations reduced support tickets related to blacklistings.

Download Study



Designed to accept your spam

MailChannels Cloud is the only email sending service that scans your outgoing email, blocks the spam, and then notifies you of the users or scripts responsible for spamming so you can shut them down. Spammers consume your valuable network and server resources: shut them down quickly with MailChannels Cloud.

Easy to deploy

Sending email through MailChannels Cloud is as simple as configuring a “smart host” in your mail server settings. MailChannels Cloud integrates with Microsoft® Exchange Server, Odin™ Plesk, cPanel, SmarterMail, Exim, Postfix, Sendmail, IceWarp, and any other mail server that support SMTP authentication.


There is no long-term commitment or hidden fees with MailChannels Cloud. Pricing is based on email volume only. You can send from unlimited domains, email addresses and servers.

Fully automated

MailChannels Cloud requires no ongoing maintenance or tweaking. Start sending today, and never look back.

Highly deliverable

Intelligent systems monitor delivery statistics and adjust sending behavior to maximize the likelihood that your email will reach the inbox. Never see another blacklist error again.

Scalable and reliable

MailChannels Cloud automatically scales to accommodate your email volume. Servers located in nine different data centers in three countries ensure continuous and reliable operation.

Use Cases

Shared Hosting Providers

You can use MailChannels Cloud to ensure reliable email delivery for your customers and eliminate support tickets due to email blacklisting issues. Improve security by tuning in to compromised account notifications. Fix malware-infected WordPress scripts, stolen user accounts and rooted servers by having MailChannels watch out for spamming activity.

Mailbox Providers

You can use MailChannels Cloud to detect and block compromised (stolen) user accounts within seconds. Eliminate support incidents related to IP blacklisting. Free up IT resources to focus on your growth, rather than problems caused by spammers.

Business Email

Can’t get mail delivered? Has your service provider blocked your email? Is your mail server IP address blocked? You can configure your mail server to send through MailChannels Cloud and immediately resolve email delivery problems.

Getting Started with MailChannels Cloud

1. Sign Up

After signing up, you will gain access to the MailChannels Cloud Console - the web administration interface.

2. Smart host your mail server over to our mail server.

Your mail server inserts the identity of the user who created each message in the form of X-Headers. This information is used to track users and identify accounts that are spamming.

3. Set up sender authentication

By inserting “X-AuthUser” header, your mail server tells MailChannels Cloud which user account is responsible for each message. This is a critical step for isolating hacked accounts and ensuring successful results.

Interested? Get in touch