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Summary

While some senders may observe seasonal spikes in bounce rates from Yahoo, particularly due to disabled mailboxes (often indicated by a 554.30 bounce code), official documentation and expert consensus indicate that Yahoo does not conduct annual deactivation campaigns. Instead, mailbox deactivation and deletion is an ongoing, continuous process.

What email marketers say

Email marketers frequently monitor changes in bounce rates and deliverability, leading to observations about patterns that might suggest annual clean-up efforts by ISPs like Yahoo. While these observations are valid from a sender's perspective, they don't always align with the continuous nature of ISP maintenance.

Marketer view

Marketer from Email Geeks indicates they are observing a rise in 554.30 'disabled mailbox' bounce messages from Yahoo. They are inquiring whether Yahoo has recently conducted a deactivation campaign, similar to Google's, or if it indicates issues with their email lists.

28 Jul 2023 - Email Geeks

Marketer view

Marketer from Email Geeks suggests that Yahoo typically performs annual deactivation campaigns around this time of year, implying that the observed increase in bounces might be part of a recurring pattern.

28 Jul 2023 - Email Geeks

What the experts say

Experts with deep insight into ISP operations clarify that email deactivation at major providers like Yahoo is a continuous, automated process rather than a scheduled annual event. This ongoing maintenance helps maintain system health and security.

Expert view

Deliverability expert from SpamResource states that high bounce rates, particularly 'mailbox not found' errors, are typically a direct result of poor list hygiene and not necessarily a global deactivation event from an ISP.

10 Apr 2024 - SpamResource

Expert view

Email deliverability expert from Word to the Wise advises that ISPs like Yahoo continuously prune inactive accounts. Senders should focus on maintaining an active, engaged list rather than waiting for annual clean-up campaigns.

22 Jun 2023 - Word to the Wise

What the documentation says

Official documentation from Yahoo provides clear guidelines on how inactive email accounts are handled. These policies are foundational to understanding bounce reasons and maintaining effective email deliverability.

Technical article

Yahoo Help documentation explicitly states that Yahoo Mail accounts become inactive if they have not been accessed for a continuous period of 12 months. This is the primary criterion for potential account deletion.

01 Jan 2023 - Yahoo Help

Technical article

Official Yahoo policy clarifies that once an account is deemed inactive for 12 months, Yahoo reserves the right to terminate the account and permanently delete all associated data, including emails and contacts.

01 Jan 2023 - Yahoo Help

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