Yahoo Mail’s Storage Limit Change Impacts Senders

Yahoo Mail's recent reduction in its free storage limit from 1TB to 20GB has led to an increase in email delivery blocks due to full mailboxes, impacting email senders, particularly those with relaxed sunset policies or re-engagement campaigns. This change aligns Yahoo Mail with other major providers but significantly lowers the previous storage capacity, prompting users to consider upgrading to higher storage plans. As a result of the new limit, Twilio SendGrid observed a substantial rise in 'mailbox full' blocks, with a 5,500% increase in such blocks over recent weeks. Senders are advised to reassess their sunset policies and sending strategies to mitigate the effects of these storage limit changes, potentially utilizing frequency reduction models and professional services for optimization.