How to troubleshoot Barracuda and Yahoo! email blocking issues during domain warm-up?

Email marketer from Litmus shares the need to actively manage your sender reputation by consistently authenticating your emails, keeping your email lists clean, and monitoring engagement metrics. Litmus suggests senders maintain a healthy sender reputation to improve your email deliverability. Use feedback loops to remove subscribers that mark emails as spam.

Email marketer from Email Geeks asks about reaching out to Barracuda for advice, noting they only know how to unblock IPs from their blocklist.

Email marketer from Mailjet highlights that as of February 2024, Yahoo and AOL will require senders to authenticate their email using SPF, DKIM, and DMARC. In addition, they must offer one-click unsubscription and ensure their spam rate remains below 0.3%. Failing to meet these requirements will result in blocked emails.

Email marketer from Email Marketing Forum answers question about checking IP reputation during the warm-up phase. The user says that it's important that senders verify that their IPs are not listed on blacklists. Senders should also check the reputation of IPs by sending test emails to multiple email accounts.

Email marketer from MailerQ explains the importance of setting up and monitoring feedback loops (FBLs) with ISPs like Yahoo. FBLs provide data on which of your emails are being marked as spam by users. This allows you to identify and remove problematic subscribers, improving your sender reputation.

Email marketer from GlockApps highlights the need to monitor Barracuda reputation using their seed list testing feature. Barracuda uses reputation-based filtering, so ensure your sending IP and domain have a good reputation score with them. GlockApps' tool can identify if you're being blocked by Barracuda.

Email marketer from StackOverflow user 'MailGuru' shares the importance of having a properly configured reverse DNS (rDNS) record for your sending IP address. The rDNS should match your sending domain to establish credibility. Many ISPs, including Yahoo, check rDNS for verification.

Email marketer from Reddit user u/EmailExpert advises checking if your domain or IP is on any major blacklists (e.g., Spamhaus, SORBS). Also, monitor your domain reputation using tools like Google Postmaster Tools. Poor reputation can lead to deliverability issues, especially during warm-up.

Email marketer from GMass Blog explains that SPF and DKIM are crucial for email authentication. Ensure these records are properly configured for your sending domain to verify your emails' legitimacy and prevent spoofing. This helps build trust with ISPs like Yahoo and improve deliverability.

Email marketer from Neil Patel's Blog emphasizes the importance of consistent sending volume and positive engagement (opens, clicks) during domain warm-up. Start with small batches and gradually increase volume, focusing on sending to highly engaged subscribers first. Also, make sure your emails follow anti-spam rules.

Expert from Word to the Wise answers question about Yahoo enforcing stricter DMARC policies for senders sending more than 5000 email per day. They need to authenticate their emails properly or risk getting blocked. Implementing a strict DMARC policy (p=reject or p=quarantine) and adhering to Yahoo's guidelines are key to successful delivery.

Expert from Email Geeks suggests that the Yahoo! block might be due to an oddly configured network, such as rDNS on the connecting IP not being forward confirmed, a problematic ASN, or using a bare IP HELO.

Expert from Spamresource outlines Yahoo's requirements for bulk senders, including authentication using SPF and DKIM, maintaining a low complaint rate, and providing easy unsubscribe options. Non-compliance can lead to deliverability issues, especially during the warm-up phase.

Expert from Email Geeks advises that a three-letter domain that mimics a large financial institution and has a history of phishing activity should not be placed on any shared infrastructure.

Expert from Spamresource suggests monitoring your sending reputation with Barracuda by checking their Reputation Block List (BRBL). Delist proactively if your IP ends up on it and ensure compliance with their sending policies, as Barracuda heavily relies on reputation-based filtering.

Expert from Email Geeks explains that Yahoo is not using Barracuda and suggests the "custom rule" in the Barracuda filter message BSF_SC0_TG301META is likely independently identified as spam. BSF likely stands for Barracuda Spam Filter and TG301 is related to the metadata in the message.

Expert from Email Geeks responds to the question about how to contact Barracuda to say that the person she knew there isn’t anymore and suggests trying mailop or using postmaster.

Documentation from RFC 2821 (SMTP standard) outlines the requirement for a valid HELO/EHLO greeting. The hostname or address presented must be resolvable and properly configured, otherwise it can lead to rejections by receiving servers. Ensure your mail server presents a valid HELO/EHLO.

Documentation from Yahoo Help explains that Yahoo's Postmaster Tools provides data and diagnostics on your email traffic. Monitor metrics like spam rate, feedback loop, and authentication status to identify and resolve deliverability issues. This provides visibility into why Yahoo might be blocking your emails.

Documentation from Barracuda Networks explains that BRBLs are lists of IP addresses known to send spam. Being listed can cause emails to be blocked. Check your IP against these lists using online tools, and follow Barracuda's delisting procedures if listed.

Documentation from Google Postmaster Tools shares that although these tools don't directly affect Barracuda or Yahoo, it provides insights into your sending reputation with Gmail. Healthy sender reputation with Gmail often correlates to improved deliverability across other email providers as it checks many of the same things, like spam rates.

Documentation from Spamhaus explains the importance of checking IP and domain reputation against blocklists like the Spamhaus Blocklist (SBL). Being listed on SBL can cause significant deliverability issues. Use Spamhaus's lookup tool to check your IP/domain and follow their delisting procedures if necessary.