Summary
Industry experts generally agree that Korumail.com has a minimal, if any, discernible impact as a widely recognized Real-time Blackhole List (RBL) or a significant factor in general email deliverability monitoring, with many professionals reporting no influence on their delivery logs. However, external diagnostic tools and community databases present a contrasting view, consistently indicating that Korumail.com's own domain and associated IP addresses frequently appear on various RBLs, receive numerous spam reports, and maintain a poor or neutral sender reputation. This suggests that while Korumail may not widely affect others' deliverability as a blocking entity, its own email deliverability is significantly impaired due to a history of spamming activity and subsequent blacklisting.
Key findings
- Limited RBL Impact: Email deliverability experts largely report that Korumail.com has little to no observed impact on the deliverability of other senders' emails as a public Real-time Blackhole List (RBL) or common blocking factor in their delivery logs.
- Korumail's Own Poor Reputation: Despite its limited impact as a blocking entity, diagnostic tools and spam databases frequently list Korumail.com's IP addresses and domain on various RBLs, citing a history of numerous spam reports and association with forum spam.
- Impaired Self-Deliverability: Due to its consistent poor sender reputation and recurrent blacklisting, Korumail.com's own emails are often rejected by recipient mail servers or routed directly to spam folders.
- Internal Query Tool Available: Korumail offers a tool at tools.korumail.com that can be used to query its internal blacklist, though public information regarding delisting processes is not available.
Key considerations
- Distinguish Korumail's Roles: It is crucial to differentiate between Korumail.com as a potential spam filtering service or RBL provider, which experts suggest has low impact on general email deliverability, and its status as a domain whose own sending reputation is consistently poor.
- Verify RBL Relevance: While some monitoring tools might show Korumail listings, their actual impact on broader email delivery appears negligible according to experienced email marketing professionals.
- Holistic Reputation Check: Relying on multiple reputation services and widely recognized RBLs, beyond less impactful ones like Korumail, provides a more accurate assessment of potential email deliverability issues.
- Spam Reporting Consequences: Frequent spam complaints and listings on community-driven databases directly contribute to a sender's poor reputation and significantly hinder email deliverability, as evidenced by Korumail.com's own reported issues.
What email marketers say
5 marketer opinions
While email deliverability professionals widely observe that Korumail.com listings rarely appear in delivery logs and have minimal impact on the broader email ecosystem as a public Real-time Blackhole List, Korumail.com's own email deliverability is demonstrably hindered. Its domain and associated IP addresses are frequently found on community-driven databases such as StopForumSpam and internal blocking lists like SpamCop, directly resulting from user-submitted spam reports and widespread involvement in forum spamming. These consistent negative reports significantly impair Korumail.com's sender reputation, causing its outgoing emails to be rejected or quarantined by mail servers that rely on such comprehensive spam intelligence.
Key opinions
- Limited Public RBL Effect: Email experts consistently note that Korumail.com, despite appearing in some monitoring tools, is not commonly seen in delivery logs and does not significantly impact general email deliverability as a widespread RBL.
- Korumail's Own Blacklisting: The Korumail.com domain itself, along with its associated IP addresses, is frequently blacklisted due to its involvement in spamming activities, as reported by community-driven platforms like StopForumSpam.
- Impact from Spam Reports: User-submitted spam complaints to services such as SpamCop lead to Korumail.com's inclusion on internal blocking lists, directly contributing to its poor sender reputation and reduced deliverability.
- Internal Query Tool: Korumail provides a tool at tools.korumail.com to query its blacklist, though information regarding delisting processes is not publicly available.
Key considerations
- Prioritize Major RBLs: Senders should primarily focus on widely recognized and impactful RBLs and reputation services for monitoring their own deliverability, as Korumail's influence in this regard appears minimal.
- Understand Community Reporting: The case of Korumail.com underscores how community-driven spam databases and user reports can profoundly impact a domain's deliverability, even if it is not a major RBL itself.
- Maintain Clean Sending Practices: A history of spamming, as observed with Korumail.com, leads to consistent blacklisting and significantly damages a sender's reputation, severely impeding their ability to reach inboxes.
Marketer view
Marketer from Email Geeks explains that while monitoring tools like HetrixTools show Korumail listings and delistings, he has never seen Korumail appear in delivery logs. He notes that tools.korumail.com can be used to check blacklists but offers no delisting information, and doubts Korumail has a significant effect on email delivery.
14 Aug 2023 - Email Geeks
Marketer view
Marketer from Email Geeks suggests Korumail appears to be a spam filtering service or appliance. He notes that Multirbl lists krn.korumail.com, which may or may not accept public queries, and agrees with others that Korumail is not commonly known in the industry.
28 Oct 2022 - Email Geeks
What the experts say
1 expert opinions
An email deliverability expert, leveraging years of experience with millions of bounce reports, states that she has never encountered Korumail as a factor in email delivery issues, implying its impact is minimal or non-existent. While Korumail.com has been linked to the KRN reputation service since 2018, it does not mention a publicly available Real-time Blackhole List. The expert further cautions that excessive monitoring can be as problematic as insufficient monitoring, suggesting that any observed Korumail activity may not be indicative of widespread deliverability concerns.
Key opinions
- No Public RBL: Korumail.com does not publicly advertise or operate a widely accessible Real-time Blackhole List.
- KRN Service Link: Since 2018, Korumail.com has been associated with the KRN reputation service, though its specific function within KRN is not detailed.
- Minimal Expert Observation: An email deliverability expert, with years of experience reviewing millions of bounce reports, has never encountered Korumail, suggesting its impact on general email delivery is negligible.
- Limited Deliverability Factor: The expert's direct experience indicates that Korumail.com has little to no discernible effect on widespread email deliverability, despite any observed activity in certain diagnostic tools.
Key considerations
- Strategic Monitoring: Email marketers should prioritize monitoring widely recognized and impactful RBLs and reputation services, as excessive monitoring of minor or unproven entities can be counterproductive.
- Evaluate Actual Impact: It's important to assess the actual, observed impact of a service on email delivery rather than relying solely on its existence or association, as an expert's extensive experience indicates Korumail has little practical effect.
- Over-Monitoring Risks: Be cautious of the pitfalls of over-monitoring, as it can obscure truly significant deliverability issues and consume valuable resources on factors with negligible influence.
Expert view
Expert from Email Geeks responds that the Korumail website does not mention a publicly available RBL, though it has been associated with the KRN reputation service since 2018. Drawing on years of experience reviewing millions of bounce reports, she has never heard of Korumail, indicating it has little to no impact on email delivery. She also cautions that monitoring too much can be as problematic as monitoring too little, suggesting Korumail's observed activity might not be indicative of widespread deliverability issues.
7 Feb 2022 - Email Geeks
What the documentation says
3 technical articles
Korumail.com's ability to deliver its own emails is significantly hampered by consistent negative reputation indicators from various diagnostic and intelligence sources. Its associated IP addresses frequently appear on Real-time Blackhole Lists (RBLs), as reported by tools like MXToolbox, leading to emails being rejected or sent to spam folders. Furthermore, services such as AbuseIPDB document multiple spam reports linked to Korumail's sending IPs, while Cisco Talos Intelligence's SenderBase system often assigns Korumail.com a 'Poor' or 'Neutral' email reputation. These factors collectively indicate a history of suspicious activity, directly impacting deliverability by causing recipient mail servers to block or flag incoming messages.
Key findings
- RBL Appearances: Korumail.com's sending IP addresses are consistently listed on various Real-time Blackhole Lists (RBLs), as documented by tools like MXToolbox.
- Frequent Spam Reports: IP addresses linked to Korumail.com receive multiple spam reports, according to databases such as AbuseIPDB.
- Poor Reputation Score: Korumail.com maintains a 'Poor' or 'Neutral' email reputation from services like Cisco Talos Intelligence, indicating a history of problematic sending.
- Impaired Deliverability: These reputation issues directly cause Korumail.com's outgoing emails to be rejected by recipient mail servers or classified as spam.
Key considerations
- Monitor Reputation Services: Proactively monitor IP and domain reputation across diverse diagnostic tools and intelligence services to identify potential deliverability hurdles.
- Address RBL Listings Promptly: Blacklisting on Real-time Blackhole Lists (RBLs) severely impacts deliverability, necessitating immediate action for removal and improved sending practices.
- Manage Spam Complaints: A high volume of spam reports directly damages sender reputation, leading to email rejection or spam folder placement by recipient servers.
- Maintain Good Sending Practices: Consistently adhering to best practices is essential to avoid negative reputation indicators that hinder email deliverability.
Technical article
Documentation from MXToolbox's diagnostic tools indicates that specific IP addresses used by Korumail.com for sending email have appeared on various Real-time Blackhole Lists (RBLs). This significantly impairs email deliverability from the Korumail.com domain, often causing emails to be rejected or routed directly to spam folders by recipient mail servers due to a poor sender reputation.
12 Feb 2024 - MXToolbox
Technical article
Documentation from AbuseIPDB indicates that an IP address often associated with mail.korumail.com has received multiple spam reports. These frequent abuse reports directly impact email deliverability from Korumail.com, as recipient mail servers and spam filters are programmed to block or flag emails originating from IPs with a history of suspicious or spammy activity.
16 Nov 2022 - AbuseIPDB
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