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Email Anti-Spam Detection

Vendor AppRiver Cisco GFI Max McAfee Mimecast ProofPoint Symantec TrendMicro
Product SecureTide Cloud Email Security GFI MailEssentials Online SaaS Email Protection Mimecast Email Security Proofpoint Essentials Email Security.Cloud Hosted Email Security
IP Reputation
info: Usually the first layer of defense, IP Reputation filtering can be used to tell if a certain IP Address is responsible for sending Spam or Unwanted Bulk Email
SecureTide SenderBase Yes IP reputation connection manager ARMed SMTP Yes 3 Connection Manager Email Reputation Services (ERS)
Multilayer Scan
info: Multiple Layer scanning puts email through 2 or more different branded engines for better filtering results.
Yes Yes Yes No Yes Yes Yes No
Spam Engine
info: Spam Engines built-in in the service
SecureTide CASE (Context Adaptive Scanning Engine) SpamRazer MX Logic ARMed SMTP Proofpoint MLX Messagelabs TMASE
Catch Rate
info: Spam catch rate: (Total Spam - Total Spam Delivered) / Total Spam = resulting %. Defined by the Service Level Agreement (SLA)
99%+ 99%+ 99% 99%+ 99% 99% 4 99%+ 99%+
False Positives
info: False Positives as defined by the Service Level Agreement (SLA)
N/A <1 in 1,000,000 <1 in 100,000 N/A <0.0001% <1 in 350,000 <0.0003% <0.0003%
Bulk Tagging
info: Bulk Email or graymail is generally used for legitimate mailings, such as for email list subscribers. Some services tag bulk email Headers or Subject fields so users can easily manage it by creating their own rules around it.
Yes Yes No Yes Yes Yes Yes N/A
info: Sender Policy Framework (SPF) for inbound mail filtering adds significant processing overhead and can generate false positives without adding any appreciable effectiveness to spam detection. Therefore, many providers do not implement SPF.
Yes Yes Yes Yes Yes Yes Yes Yes
Filter Sensitivity
info: Increase/decrease spam filtering sensitivity to define how aggressively engines react to marketing mailing campaigns or false positves.
Yes Yes No N/A Yes Yes N/A Yes
Block by Country
info: Blocks originating mail from countries predefined. An organization may want to block countries they are not doing business with or does not approve. This feature is also used to block Russian, Chinese and Japanese generated spam using Cyrillic and double-byte character sets (DBCS) content.
Yes N/A No No No Yes No Yes
info: When a domain has catch-all enabled, the anti-spam filtering service handling the mail for that domain accepts mail sent to any address that has not specifically been created, as long as the domain name is correct. This allows misspelled recipient email addresses to still be delivered. If catch-all is not supported by the anti-spam filter the message will be rejected with an -unknown user- error.
Yes N/A No No Yes No No No
Alias Support
info: Alias support allows spam filters to consolidate multiple email addresses under a single email address (the owner address). Example where the owner address is and aliases associated are, and
Yes Yes Yes Yes Yes Yes Yes Yes 1
Alias Limit
info: Some products have a cap on the number of aliases that can be associated with each mailbox and requiere additional costs for extra alias added where other platforms provide unlimited aliases support.
Unlimited Unlimited Unlimited Unlimited Unlimited Unlimited Unlimited N/A
IPv6 Support
info: Support inbound SMTP (TCP port 25) connections over IPv6. If a spam filter does not support IPv6 then you may want disable inbound Simple Mail Transfer Protocol (SMTP) over IPv6 on your Email server. IPv6 is incompatible with IPv4 directly, and it will take several years or longer before IPv4 is no longer viable.
N/A Yes No N/A No N/A No No

See glossary of terms. If you see something not right with the data - like missing information or wrong data - you can report it on

  • 1. It is not possible to manage multiple email addresses or aliases using a single EUQ account. Each email address will have its own EUQ account that cannot be merged with others.
  • 2. Users receive a combined Quarantine Report for any alias domain, along with the associated primary domain.
  • 3. Uses PDR technology (Proofpoint Dynamic Reputation).
  • 4. ProofPoint Essentials SLA does not warrant the accuracy of the intended email blocking of any mail message, the services will meet customer’s requirements or that no email will be lost or that the services will not give false positive or false negative results or that all spam and viruses will be eliminated or that legitimate messages will not be occasionally quarantined as spam.
  • 5. Requires Graymail Control.