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550-Please turn on SMTP Authentication in cPanel
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 turn on SMTP Authentication in your mail client. 550-(mail.server.net) [xxx.xxx.xxx.xxx]:36825 is not permitted to relay through 550 this server without authentication. All popular mail servers have SMTP authentication enabled for security protection. Mail accounts using those servers need to authenticate first, before trying to send mails. At times
Why are my emails being treated as SPAM?
Why are my emails being treated as SPAM? Most email service providers use complex anti-spam filters. These filters usually determine which email is SPAM based on their experience and practices. Some of the most common reason for emails to end up as SPAM are: The originating domain name – your domain – is on a blacklist If your domain name has been blacklisted, this will cause issues with email delivery and unfortunately can’t be controlled, or avoided from our end. If your domain is bla
550 This message was classified as SPAM and may not be delivered
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 email 550 This message was classified as SPAM and may not be delivered Common solutions to the error Solution #1 – Enable SMTP Authentication in Outlook If you are using the Microsoft Outlook email client, not having SMTP Authentication will cause several points to be added to the spam score. This can cause emails that other
MailChannels – Which IP Addresses does it send from?
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 send changes from time to time. Fortunately, the list is always available in our SPF records and you can look up the list easily with online tools. We recommend using the SPF record lookup available at MXToolbox: http://mxtoolbox.com/SuperTool.aspx?action=spf%3arelay.mailchannels.net&run=toolpage# Another useful tool for listing SPF records i
Email – What is the difference between SSL, TLS, and STARTTLS?
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, but not everyone knows what these mean. This article should help provide some basic information about each term. SSL SSL stands for “Secure Sockets Layer”, and utilized SSL certificates to help identify the server you are connecting to and start encryption. This was one of the recommended protocols used by services that requi
MailChannels – How do I report a ‘false positive’?
MailChannels – How do I report a ‘false positive’? Overview All spam filtering systems make mistakes from time to time. When a spam message is delivered instead of being blocked, this is described as a false negative. A false positive is the reverse — when the system blocks a legitimate message. Report False Positive If your legitimate email message is blocked by MailChannels, an error message is generated and included in the non-delivery report you receive from your mail server wh
MailChannels – Fixing the 550 5.7.1 [SS] 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 account. The 550 5.7.1 SS error indicates that the subject line in this/these message(s) contained one or multiple spam-like keywords commonly used on abusive or unsolicited email. The 5.xx nature of the response code indicates that this was a permanent failure and your message(s) were returned and not delivered due to the high probability of spam cont
What are MailChannels Insights, and how do I use them?
What are MailChannels Insights, and how do I use them? MailChannels Insights allows MailChannels Outbound Filtering customers to access email delivery information and intelligence about the deliverability of their email. Investigate any deliverability issues in your network. Find out why your email was not delivered. ResponseAnalytics™ technology reports what receivers think of your customer’s email. How to Use MailChannels Insights You must have access to MailChannels Host Conso
Common email bounce messages / errors
Common email bounce messages / errors Often, if an email delivery fails, the original email is returned to its sender with an error explaining what caused the issue. These returned emails are referred to as bounce-back emails. We prepared a list of common bounce back errors to help identify why your email might not be delivered to its intended recipient(s): Mailbox not found Invalid mailbox User unknown Mailbox unavailable Mailbox not found The most common reason for al