Several factors can cause a drop in email deliverability. These include:
Poor Sender Reputation: Your IP address and domain reputation play a significant role. Sending emails to invalid addresses or having a high bounce rate can negatively impact your reputation. Content Quality: Emails containing spammy content, misleading subject lines, or too many images vs. text can trigger spam filters. List Hygiene: Not keeping your email list clean by removing inactive subscribers can lead to higher bounce rates and complaints. Authentication Issues: Lack of proper email authentication protocols like SPF, DKIM, and DMARC can cause deliverability issues. Frequency of Emails: Sending too many emails in a short period can overwhelm recipients and increase the likelihood of them marking your emails as spam.