Why are my emails going to spam even with a low spam rate?
Summary
What email marketers say11Marketer opinions
Email marketer from Reddit user u/EmailExpert explains that spam filters analyze email content. Using spam trigger words, excessive links, or a poor HTML-to-text ratio can lead to spam placement, regardless of the overall spam rate.
Email marketer from Gmass explains that inconsistent sending patterns can negatively impact deliverability. Maintain a regular sending schedule to establish a positive sending reputation.
Email marketer from Sendinblue explains that missing or incorrect authentication records (SPF, DKIM, DMARC) can flag emails as suspicious, even if the spam rate is low. Implement these to verify your sending identity.
Email marketer from Email Geeks asks to validate engagement rate. If it is close to 2X than usual then a high unsub/abuse rate can be expected.
Email marketer from Mailjet explains that even with a low spam rate, poor IP reputation can cause emails to go to spam. This is especially true if you're on a shared IP address.
Email marketer from Email on Acid explains that even with a low spam rate, an outdated or poorly maintained email list can contain spam traps or invalid addresses that damage your sender reputation.
Email marketer from HubSpot explains that using a shared IP address means your reputation is tied to other senders on that IP. Their negative practices can impact your deliverability, even with a low spam rate. A dedicated IP offers more control.
Email marketer from StackOverflow user EmailGuru explains that drastically increasing sending volume suddenly, even with a low spam rate, can trigger spam filters. Gradually warm up your IP address and sending domain.
Marketer from Email Geeks suggests that increased spam reports could be due to more users at home scrutinizing their inboxes and cleaning them up.
Email marketer from Quora user DigitalMarketer123 explains that misleading sender names or deceptive subject lines can cause recipients to mark emails as spam, even if the content itself is not spammy and your reported rate is low.
Email marketer from Litmus explains that low engagement rates (opens, clicks) signal to mailbox providers that your emails are not valuable to recipients. This can lead to emails being filtered as spam, regardless of the reported spam rate.
What the experts say6Expert opinions
Expert from WtotheWise, Karen Talavera, responds that even with permission based marketing, if you email too often or too little you can damage deliverability because people forget about you and mark you as spam. Sending from shared domains and IPs can also cause deliverability issues.
Expert from Email Geeks suggests to consider what was sent just before the spike date that might have caused more complaints than usual.
Expert from Email Geeks explains that zero email volume combined with complaints from previous days' mailings can cause spam rate spikes, though one or two days usually doesn't have a huge impact.
Expert from WtotheWise, Laura Atkins, responds that if the list acquisition isn't well documented, it may contain spam traps or unengaged recipients which cause poor deliverability. Also, improper list management and hygiene practices may lead to low engagement.
Expert from Email Geeks suggests that people may be bored at home and have time to either read emails, unsubscribe from things, or file complaints, inquiring if others have seen a lift in engagement.
Expert from Spam Resource explains that even with a low complaint rate (which contributes to spam rate), factors like poor sender reputation, lack of authentication, or being on blocklists can still cause deliverability issues. Reputation is built over time and considers many factors beyond just complaint rates.
What the documentation says4Technical articles
Documentation from Spamhaus explains that being listed on a DNSBL (DNS-based Blackhole List) due to spam-like activity, even if the overall spam rate appears low on your end, can cause significant deliverability issues. Check if your IP or domain is listed.
Documentation from Microsoft states that users individually marking emails as 'junk' or blocking the sender contributes negatively to your reputation, leading to the spam folder even with a low overall spam rate reported via feedback loops.
Documentation from RFC explains that a missing or incorrect reverse DNS (rDNS) record for your sending IP address can cause deliverability issues. Many mail servers use rDNS to verify the legitimacy of incoming mail.
Documentation from Google Postmaster Tools states that even a small number of spam complaints can negatively impact deliverability, especially if the volume of emails sent is also low, suggesting proactive list cleaning.