We have recently seen an increase in bounce back messages from bounce-back the following error code:

The mail system email@email.com: host aspmx.l.google.com[99.99.99.99] said: 550-5.7.1 [99.99.99.99 12] Our system has detected that this message is 550-5.7.1 likely unsolicited mail. To reduce the amount of spam sent to Gmail, 550-5.7.1 this message has been blocked. Please visit 550-5.7.1 https://support.google.com/mail/?p=UnsolicitedMessageError 550 5.7.1 for more information.

The link provided takes you to an area which explains all of the possible reasons for the block. If you receive that error message try the following possible solutions.

A message might be blocked if it contains suspicious-looking or spammy text or if the sending IP has had a history of sending unsolicited messages. It’s likely that only a subset of the messages which have a strong likelihood of being spam are being blocked and not all of your messages. You can use the following 3rd party link Mail-tester.com. Mail-tester.com will analyze your message, your mail server, your sending IP… and show you a detailed report of what’s configured properly and what’s not.

If you’re forwarding mail to Gmail then your domain also forwards spam which causes issues with Gmail and how it processes your mail. To correct this issue Gmail would prefer that you use the Gmail interface as a mail client instead of using the forwarding option. By setting up your domain’s email address as a POP3 and SMTP account in your Gmail account, you can use Gmail as an email client (much like you would use Outlook, Mac Mail, or Thunderbird).

Step 1: Log into your Gmail account.

Step 2: Click on the Cog drop-down menu (in the upper-right) and select Settings.

Step 3: Click the Accounts tab.

Step 4: Next to Check mail from other accounts:, click Add a mail account.

Step 5: Enter the email address you created for your domain and click Next.

Step 6: Enter the POP3 settings for your domain’s email address. Then click Add Account.

Step 7: To continue to set up SMTP in Gmail, select Yes and click Next Step.

Step 8: Enter your Name, as you would like it to appear when sending emails from this account. Also, ensure that the check box for Treat as an alias is checked. Click the Next Step button to proceed.

Step 9: On the Send mail through your SMTP server page, fill in your SMTP Server (typically this is mail.yourdomain.com), Username (full email address), and Email Password. Then, click the Add Account button

Step 10: Now, Gmail will email a verification code to the email address you just added. You can either click the link in the email or copy/paste the code into the text box and click Verify. Now you will see your domain’s email address in the Send mail as and the Check mail from other accounts sections.

 

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