What spam filters do NetZero and Juno use, and how can I resolve blocking issues?

Email marketer from Email Deliverability Blog emphasizes the importance of creating engaging and relevant email content that recipients want to receive. High engagement rates (opens, clicks) signal to ISPs like NetZero/Juno that your emails are valuable and less likely to be spam.

Email marketer from Gmass recommends using dedicated IPs, which establishes your brand as the sole sender of emails from the source. As a result, sender reputation and deliverability rates are improved. This method is best for businesses that send large email volumes.

Email marketer from EmailGeek Forum user SenderBest suggests setting up feedback loops (FBLs) with NetZero/Juno if available. FBLs provide valuable information about which emails are being marked as spam by recipients, allowing senders to identify and address potential issues with their content or targeting.

Email marketer from Email Vendor Selection recommends contacting NetZero/Juno directly via their postmaster channels or abuse reporting mechanisms, if available, detailing the issue and providing relevant logs or data to expedite the resolution process.

Email marketer from Quora user EmailExpert stresses the importance of rigorous list hygiene, including removing invalid or inactive email addresses from your sending list. Sending to outdated or invalid addresses can negatively impact sender reputation and increase the likelihood of being blocked by ISPs like NetZero/Juno.

Email marketer from Mailjet's Blog advises avoiding the use of common spam trigger words and phrases in email subject lines and body copy. These words can trigger spam filters used by NetZero and Juno, even if your emails are otherwise legitimate.

Email marketer from Stack Overflow user EmailPro recommends actively monitoring IP and domain reputation using tools like Google Postmaster Tools and Sender Score. This helps identify any sudden drops in reputation that might lead to blocking issues with ISPs like NetZero/Juno.

Marketer from Email Geeks offers to help identify if IP blocking issues with NetZero/Juno are related to Cloudmark, if provided with the IPs in question.

Email marketer from Litmus suggests thoroughly testing emails across different email clients, including those used by NetZero and Juno, before sending. This ensures that your emails render correctly and don't contain elements that might trigger spam filters.

Email marketer from Reddit user MailGuru suggests a gradual IP warming strategy when sending to NetZero/Juno subscribers. This involves starting with a small volume of emails to highly engaged users and gradually increasing the volume as positive engagement metrics (opens, clicks) are observed.

Expert from Email Geeks explains that NetZero and Juno primarily use their own homegrown filters. Additionally, she provides a link to a United Online postmaster page (<http://postmaster.untd.com/blocked.html>) that might be helpful for NetZero as well, suggesting it could potentially resolve blocking issues.

Expert from Word to the Wise answers explains that getting support staff involved in solving blocking problems with smaller ESPs will increase the chances of the problem being solved quickly. This is because you will be speaking to the right people, and more likely to get a response. In addition, smaller ESPs have smaller support teams, meaning that support staff are more likely to be able to solve technical problems.

Expert from Spam Resource strongly recommends maintaining rigorous list hygiene, including regular removal of inactive or non-existent email addresses. This helps maintain a positive sender reputation and prevents being flagged as a spammer, which can particularly affect delivery to smaller ISPs like NetZero and Juno.

Expert from Spam Resource advises setting up Feedback Loops with any ISP, including NetZero and Juno, that offers them. Feedback loops provide data on user-marked spam, allowing senders to identify and correct practices leading to those complaints.

Documentation from United Online Postmaster provides a resource (<http://postmaster.untd.com/blocked.html>) for senders experiencing blocking issues with NetZero and Juno, detailing their email policies and offering a contact form for resolution.

Documentation from DMARC.org details the Domain-based Message Authentication, Reporting & Conformance (DMARC) standard, which helps protect your domain from email spoofing and phishing attacks. Implementing DMARC, along with SPF and DKIM, can improve email deliverability and reduce the chances of being blocked by ISPs like NetZero and Juno.

Documentation from Spamhaus explains the process for checking if an IP address is listed on their blocklists, which can affect deliverability to various ISPs including NetZero and Juno. It also details the steps required for removal, if applicable, ensuring compliance with Spamhaus' policies.

Documentation from RFC Editor describes the standards outlined in RFC 5321, emphasizes adherence to SMTP standards for proper email formatting and transmission. Compliance helps avoid triggering spam filters used by ISPs such as NetZero and Juno.