Why are Yahoo inbound emails delayed and causing low open rates?

Marketer from Email Geeks shares that an email to Mailop mentioned the same inbound Yahoo delays, and Lili replied that they are looking into it.

Email marketer from Email Marketing Experts Group shares that sending large volumes of emails in a short period can trigger Yahoo's spam filters and cause delays, especially for new or less established senders.

Email marketer from Email Marketing Tips mentions that Yahoo heavily relies on IP reputation, and a poor reputation can lead to significant delays and low open rates.

Email marketer from EmailGeek Community indicates that the content of the email can significantly affect Yahoo deliverability, with certain keywords or phrases triggering delays or filtering.

Email marketer from Email Deliverability Forum explains that missing or misconfigured DKIM/SPF records can cause Yahoo to delay or reject emails due to authentication failures.

Email marketer from Email Deliverability Blog suggests that Yahoo might be throttling email traffic from certain IPs or domains, leading to delays in delivery and reduced open rates.

Email marketer from Email Marketing Forum shares that Yahoo's aggressive spam filtering might delay or prevent the delivery of emails, particularly if the sender's IP or domain has a low reputation.

Marketer from Email Geeks, Ozgur Birkan Tekin, reported a significant drop in Yahoo/AOL open rates despite no SMTP errors and a high inboxing rate in seedlist tests, and Al Iverson suggested checking headers in seedlist to look for delivery delays.

Email marketer from Reddit suggests that Yahoo mail often has fluctuating delivery times due to various server-side issues that are difficult for senders to control directly.

Expert from Spam Resource responds that Yahoo uses aggressive bulk mail filtering techniques, and that these techniques can lead to legitimate emails being delayed or not delivered if the email marketing practices are not fully opt-in and compliant.

Expert from Email Geeks explains that to check for delivery delays, check the headers in a seedlist or create accounts on big free webmails to monitor.

Expert from Word to the Wise explains that Yahoo's throttling can cause delays, particularly if email programs are not compliant with authentication standards, list management and engagement metrics.

Documentation from Google Postmaster Tools indicates that monitoring email delivery times and authentication status can help diagnose and address potential delivery issues with Yahoo, even if the issues are on Yahoo's end.

Documentation from Mandrill explains that feedback loops from Yahoo can help identify deliverability issues, but delays might occur if the feedback loop is not properly configured or monitored.

Documentation from Yahoo Help explains that delays in email delivery can occur due to network congestion, server maintenance, or spam filtering processes.

Documentation from RFC Editor details that SMTP server delays are often due to greylisting or temporary server unavailability, leading to deferred delivery attempts.

Documentation from Microsoft states that SmartScreen filtering, which Yahoo might use, can delay or filter emails based on various factors, including sender reputation and content analysis.