Internet Service Providers (ISPs), such as Gmail, Outlook, and Yahoo, utilize sophisticated filtering and reputation systems to protect users' inboxes from unwanted email. Occasionally, these systems misclassify legitimate marketing emails as spam, resulting in a "false positive," which can be attributed to the sender's reputation, email content, or recipient behavior.
What specific content triggers spam filters?
Spam filters analyze the subject line, preheader, and body of your email. Common triggers include:
Spammy Words: Be mindful of keywords such as "free," "guarantee," "act now," "earn," or "risk-free."
Formatting: Avoid writing in all capital letters or using excessive punctuation (e.g., "!!!", "???").
Symbols: Limit the use of dollar signs ($$) or percentages (%).
Before sending, you should always run a spam check to catch these issues early.
Does using images affect my deliverability?
Yes, emails consisting solely of images are frequently flagged by spam filters, as these filters are unable to interpret the information within the images. To mitigate this, maintain a balance between of text and images in your emails. Furthermore, it is best to avoid using images that resemble those previously flagged as spam.
Can links inside my email cause a block?
Yes, email filters often identify the following issues:
Misleading Links: Text that appears to link to one address (e.g., "chrislandscaping.com"), but actually redirects to a different URL.
Blacklisted URLs: Links to websites that are included on public blocklists.
Link Text: Utilizing the full URL as the link text.
How does my sender reputation affect where my emails land?
Internet Service Providers (ISPs) evaluate sender reputation based on subscriber interactions with emails.
Positive Signals: Contacts opening and clicking your emails.
Negative Signals: Contacts marking your email as spam, or emails that consistently result in low open rates or high bounces. If you have low engagement, filters may start routing your future emails to the spam folder. It is crucial to optimize your subject lines to boost engagement. Â
Does my "From" email address matter?
Yes. Sending marketing emails from a free domain (like @gmail.com or @yahoo.com) can trigger filters due to strict authentication policies (DMARC). It is safer to send from a custom domain and self-authenticate your email. Â
What happens if I send the same email twice?
Sending duplicate content can hurt you. Avoid copying a sent email and resending it to the same list with the exact same subject line and content, as this is a common spam trigger. If you must resend (e.g., a reminder), always change the subject line.
What should I do if my emails are being blocked?
Check Engagement: If blocked contacts were previously opening your emails, contact support. If they rarely opened them, the issue is likely list hygiene.
Clean Your List: Regularly remove disengaged contacts. Keeping a clean list of engaged contacts helps improve your overall reputation. Â
Ask for Safelisting: Ask your subscribers to add your "From" address to their safe-sender list or "whitelist."