When a message appears in a spam box in Gmail, you should see a short message at the top of the email indicating why Gmail thinks this is spam. This can make diagnosing problems with your email campaign much simpler than playing the guessing game of "is it my domain" vs "is it my email". Sometimes the best way to determine where your email will land for Gmail is to send it to yourself, or send it to a personal Gmail account you have to identify what might be going on.
An example message shown below indicates that the content of the message was what flagged the spam filter:
Note the important part here "similar to messages that were identified as spam in the past". This indicates that a number of users have previously marked messages with similar subject and/or content that you've used as spam. You'll need to re-work your email content and subject line to avoid the spam filter. Make sure not to use too many images, and avoid words such as "FREE", "IMPORTANT" and "URGENT" in your subject line. Also avoid using all-caps in subject lines, and try to personalize the subject and email as much as possible.
Domain Reputation Issues
An example message shown below indicates your sending domain has a bad reputation:
In this example, the sending domain you've used has been frequently reported to Google as sending spam messages. This could be because you're sending out large volumes of emails to users who do not want your content, or because you've been emailing people who previously asked you not to. It's important to note that this is your reputation, not Cannabiz Media's reputation, that's causing this issue.
Did you buy an unverified email list in the past? You may have already had a bad email reputation before you began using the Cannabiz Media platform. Unfortunately, the only way to resolve this issue is either by following a remediation plan, or picking a new email domain and warming it up slowly. Either way you'll want to follow these steps to manage your domain reputation.
Emails not fully authenticated
A yellow message in an email might not trigger a spam filter, but it still might concern users, and should be addressed. Yellow warnings indicate a misconfiguration with the DNS settings with either your sender email domain, the from address, or the reply-to address. Yellow warning messages often indicate an issue that Gmail doesn't know for sure who sent the email, but can also show up if your reply-to address doesn't match the domain used in the from address:
This filter can also trigger if you're sending test emails to yourself though, so if you see this type of message make sure to send to a personal Gmail account as well and see if this is just an issue with test emails. If you continue to see this error, see our help article on configuring your email domain.
Emails requesting personal information
Even worse than getting flagged as spam is getting flagged as a phishing attempt. Phishing is when bad actors attempt to steal personal information, such as credit cards or Facebook logins from users. A red message in Gmail indicates that something in your email campaign triggered Google's anti-phishing filters:
If you have this message appear for your emails, it's time to re-think your marketing messages. Don't ask people to provide personal details, set up credit cards, or send you any sort of login credentials "for free". Don't link to pages that require a login, especially ones that look like they might be requesting Facebook or Gmail credentials.
Issues isolated to your account
Of course, there are also reasons an email might be marked as spam that are specific to something you've done, such as marking an email from a specific person as spam:
A message of "you previously marked messages from example.com as spam" means that this is because of an action you took on this account. You should click the "Report not spam" button to fix this issue.
If you have any other questions, reach out to us via the on-screen help icon or at email@example.com.