Campaigns end up in spam folders for several reasons, including the sending email address, subject line, or message content. MailChimp tools can help you test your campaign for spam triggers.
Even legitimate and innocent campaigns can get trapped in spam filters based on small issues you may not have considered, like your sending name or email address, and information shared from other spam filters.
If a lot of your recipients click the Report Spam button in their email client (e.g., Gmail, Yahoo), those services can start to block your campaigns and deliver straight to the spam folder.
If a recipient tells you he or she clicked Report Spam by accident, many email services include a Not Spam option. Ask the recipient to find the email in the spam folder, and mark it as Not Spam or Not Junk. Buttons and labels will vary by inbox. This can help keep future messages out of other recipients' spam folders, too.
If the recipient doesn't contact you directly, just call it a lesson learned. Although MailChimp can tell you who's complained about your campaigns, we don't recommend following up with those subscribers.
Prevent Spam Complaints
You may already use Inbox Inspector to find out how your campaigns look in different email clients, but you can also use it to see if your campaign contains any spam filter triggers. A Spam Filter Checker is included in Inbox Inspector, and flags parts of your campaigns that could cause complaints.
Monthly Plans include 25 inspections per week, and single inspections can be purchased for $3 each on Pay As You Go and Forever Free Plans.