Sender rejection errors and low reputation bounces, particularly with Yahoo, are caused by a multitude of factors, including poor sender reputation, blocklisting, lack of email authentication (SPF, DKIM, DMARC), high complaint rates, spam-like content, invalid email addresses, full inboxes, server issues, high bounce rates, and sending to spam traps. Solutions involve cleaning email lists, implementing email authentication, monitoring and addressing recipient complaints, warming up IP addresses, monitoring deliverability metrics, adhering to Yahoo's guidelines for bulk senders, analyzing rejection messages, contacting ESP support, avoiding spam traps, and whitelisting IPs where appropriate. Yahoo's practice of using 4xx deferrals, which might be mistaken for permanent rejections, adds complexity.
10 marketer opinions
Sender rejection errors and low reputation bounces, particularly with Yahoo, are primarily caused by poor sender reputation, which stems from factors like low list hygiene, lack of email authentication (SPF, DKIM, DMARC), high spam complaint rates, being listed on blocklists, and sending to invalid email addresses. Resolutions involve cleaning mailing lists, implementing email authentication protocols, monitoring and addressing recipient complaints, warming up IP addresses, monitoring deliverability metrics, and adhering to Yahoo's guidelines for bulk senders. Some answers mention being wary of SPF issues with Yahoo and whitelisting IPs.
Marketer view
Email marketer from Sendinblue shares that sender rejection often occurs due to poor sender reputation stemming from issues like high bounce rates, spam complaints, and being on blocklists. Solutions include improving list hygiene, implementing email authentication, monitoring deliverability metrics, and engaging with recipients to reduce spam complaints and improve sender reputation.
26 Jan 2024 - Sendinblue
Marketer view
Email marketer from Reddit responds that you should review your IP/domain reputation and check with Yahoo guidelines for bulk senders. Also make sure authentication is setup properly, and list quality is high.
16 Mar 2023 - Reddit
5 expert opinions
Experts attribute sender rejection errors and low reputation bounces, particularly with Yahoo, to various factors including poor sender reputation, being blocked or filtered, invalid email addresses, full mailboxes, and temporary server unavailability. A significant spike in email volume or user complaints can also contribute to these issues. Yahoo's tendency to use 4xx deferrals (which get retried) for questionable mail adds complexity. Resolving these problems involves checking authentication (SPF, DKIM, DMARC), avoiding spam traps, cleaning mailing lists, improving email content quality, analyzing rejection messages, and potentially contacting the ESP's support team.
Expert view
Expert from Email Geeks explains that Yahoo tends to start 4xxing mail that's iffy before other providers do and that 4xx deferral at Yahoo (which will get retried) has the same level of apparent urgency as a 5xx rejection.
16 Oct 2022 - Email Geeks
Expert view
Expert from Word to the Wise answers that bounces happen because the email address is not valid, the mailbox is full, or the server is temporarily unavailable. You should also be wary of spam traps, which can cause significant deliverability problems. Spam traps are designed to identify senders who are not following best practices for email marketing.
1 Sep 2022 - Word to the Wise
3 technical articles
According to documentation, sender rejection errors and low reputation bounces are caused by a combination of factors including IP blocklisting, lack of email authentication (SPF, DKIM, DMARC), high complaint rates, spam-like content, invalid email addresses, full inboxes, server issues, and low sender reputation stemming from high bounce rates. Resolving these involves removing IPs from blocklists, implementing proper authentication, improving email content, reducing spam complaints, proper bounce handling (removing hard bounces, monitoring soft bounces), ensuring server configuration for bounce notifications, warming up IP addresses, monitoring deliverability metrics, and engaging with recipients to reduce complaints.
Technical article
Documentation from Postmark explains that bounces can occur due to invalid email addresses, full inboxes, or server issues. To resolve bounce issues, it's crucial to implement proper bounce handling, which includes removing hard bounces from your mailing list, monitoring soft bounces, and ensuring your server is properly configured to receive bounce notifications. Reputation issues can also cause bounces.
18 Dec 2021 - Postmark
Technical article
Documentation from Yahoo Mail Help explains that emails can be blocked or bounced due to various reasons, including the sender's IP address being listed on blocklists, the sender's domain not having proper authentication (SPF, DKIM, DMARC), high complaint rates, or sending spam-like content. Resolving these issues involves removing the IP from blocklists, implementing proper authentication, improving email content, and reducing spam complaints.
12 Oct 2024 - Yahoo Mail Help
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