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550 This message was classified as SPAM and may not be delivered

This page is designed to assist those users getting the following error message within their...
550-Please turn on SMTP Authentication in cPanel

SMTP error from remote mail server after RCPT TO:: host domain.com [xx.xx.xx.xx]: 550-Please...
Email – What is the difference between SSL, TLS, and STARTTLS?

Overview The terms SSL, TLS, and STARTTLS are often used in relation to securing a connection,...
How do I enable PHPMail() on my account?

We have decided to disable the mail function because the mail() function was often used by...
How do I get the email headers for a particular email?

The headers of a message provide detailed information on the routing of a message and are an...
How to solve '550 sender verify failed' error message'?

Problem:When you try to send an e-mail message, you may receive the following SMTP error...
MailChannels – Fixing the 550 5.7.1 [SS] error

If you’re receiving this error, it means we have detected abuse originating from your email...
MailChannels – How do I report a ‘false positive’?

OverviewAll spam filtering systems make mistakes from time to time. When a spam message is...
MailChannels – Which IP Addresses does it send from?

MailChannels sends from a large number of IP addresses and the list of IP addresses from which we...
What are my Email Sending Limits?

All outbound emails are sent through a premium relay service, included free of charge with every...
What is MailChannels?

The Short Answer MailChannels Outbound Filtering is an SMTP relay service that identifies...
Why am I not able to send mail via my PHP script or application?

Why use SMTP instead of PHPMail()? By default, PHP applications will send emails using a...
Why are my emails being treated as SPAM?

Most email service providers use complex anti-spam filters. These filters usually determine...