Glossary of Terms

Email Anti-Spam Detection

IP Reputation
Usually the first layer of defense, 'IP Reputation' checking helps identify if a certain IP Address is responsible for sending Spam or unwanted bulk Email.
Multilayer Scan
Multiple Layer scanning filters inbound or outbound email traffic through 2 or more different Spam engines for an improved catch rate.
Spam Engine
Vendor branded Spam engines built-in.
Catch Rate
Spam catch rate: (Total Spam - Total Spam Delivered) / Total Spam = resulting %. Defined by the Service Level Agreement (SLA)
False Positives
False positives as defined by the Service Level Agreement (SLA)
Bulk Tagging
Bulk Email 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 and create rules based on those tags.
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.
Filter Sensitivity
Spam filter sensitivity allows to Increase/Decrease protection levels.
Block by Country
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.
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.
Alias Support
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
Alias Limit
Some products allow a limited number of aliases that can be associated with each mailbox and require additional costs for extra aliases.
IPv6 Support
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.

Email Anti-virus & Anti-malware

% Anti-virus SLA
% of Email Virus blocked as defined by the Service Level Agreement (SLA). Failing to meet the defined % usually entitles to a service credit or refund. Some 100% AV protection SLAs do not include Malware, Trojans, Phishing, Spyware or Adware. See SLAs for further information.
False Positives
% of Email blocked and falsely identified as Virus. Defined by the service SLA.
Export Quarantine
Option to export Virus quarantine for analysis or data sharing.
Virus Report
Report of virus blocked and not delivered to intended inbox.
Real-time Alert
Virus notifications alerts in real time that a virus has been blocked and not delivered.
AV Multi-Engine
Uses multi-layer Virus scanning technology with 2 or more layers of AV engines scanning each email.
Proprietary Engine
Proprietary AV engine provides more flexibility for a vendor to quickly patch a security hole and not rely on third-party engines.
AV engines
Branded AV engines scanning each email before delivery.
Quarantine specifically for Viruses and Malware.

Email Outbound Filtering

Outbound Filtering
Outbound spam detection scans email traffic as it exits the email server, identifying spam and blocking the message. Outbound spam protection will block a botnet-infected computer trying to send spam, most of the time without the user's knowledge.
Outbound AV Filtering
Scanning of outbound Email and associated attachments for virus detection.
Multilayer Scan
Multiple Layer scanning puts email through 2 or more different branded engines for better filtering results.
Signing of messages to protect against spoofing, phishing or impersonation. SPF and DKIM Authentication protocols help legitimate senders prove that their email isn't forged, and can help ISPs and corporate email servers control inbound spam. Improves deliverability and maintains a reputation for your sending domain.

Email Spooling & Continuity

Email Spooling
Email spooling or mail bagging provides a safety net in case of Email server failover. During outage it cues up all incoming Email through the service for up to several days, and delivers all upheld email once the Email server has been reestablished.
Spooling days
Number of days incoming email gets spooled and held ready for delivery.
Quarantined Days
Number of days services uphold Spam in the quarantine before being deleted.
Valid Email Backup
Services can uphold a copy of all valid Email for recovery or safety purposes. The number indicates amount of days the service will uphold valid Email before deleting it.
Always-on Email
Provides an 'always on' option in case of Email server failover, allowing not only for the email to continue to be delivered but for users to continue accessing and sending emails.
Webmail access
Webmail access so users can continue to receive, write and manage their email while the Email server is restored.

Rules & Content Filtering

Rules Engine
Set rules to allow different parameters and conditions to analyze and take action based on the content of the Email. Usually applied to prevent regulatory violations or corporate Email misuse by employees.
Basic DLP
Basic level of Data Loss Prevention on corporate information assets. Advanced DLP does require additional product licenses.
Size of Attachments
Content filtering by size of Emails attachments is used to optimize network resources by limiting the size of incoming/outgoing Email.
Binary File
Ability to block documents with attachments which are not Office file extensions or plain text files. Certain file types, such as PDF, images and libraries can automatically be blocked.
Microsoft Office 365
Ability to detect and block Email with Microsoft Office 365 file attachments.
MIME Type Filtering
Ability to block Email with MIME type attachments.
Block by Keyword
Blocking Email traffic based on specific words and phrases

Reporting and Log Search

User Reports
Daily Email spam report customized for users with Email being held as spam, virus or malware.
How often can reports be sent to administrators or users.
Report Scheduling
Automated publishing, scheduling, and email delivery of reports.
Manual Report
User option to request manually a report. This feature is used by users when an email that you are expecting is not being delivered as it allows to quickly see if it is being held in the quarantine as a false positive.
Rules Dashboard
DLP Dashboard for a consolidated view of compliance activity within the domain.
Log Updates
How often spam, virus and malware event log refreshes data.
Country of Origin
Searching logs by country of origin provides key information to create more efficient spam rules.
Log search by Field
Log search by sender, recipient, subject, etc.
Attachment search
Log search by attachment name

Administrator Management

Impersonate Users
Granting access to end user quarantines allowing the administrator to impersonate users to easily access their quarantines.
Global Quarantine
Delivers all users quarantined messages to a specified global address for admin access.
Granular Permissions
Administrator options to set policy rules across the domain or let users set their own set of rules. Granular permissions allow for control over which users will be allowed to define their own whitelists and blacklists.
Domain Policies
Setting policies as per domain.
Multiple Domain
Provisioning and administration of multiple domains.
LDAP synchronization connects to your existing LDAP server to automatically create accounts for all users in the domain. Requires read-only permission of Active Directory. Microsoft, Sun, IBM, Novell and others support the LDAP protocol.
AD Password Sync
Option to enable password sync sign so users can use their standard Active Directory username and password to provision the service.
Activity Audit
Search, message view and export the data in a format that can be used for auditing purposes.
Log search
Log search and content retrieval through an administrator search interface.
Block by Country
Block Email by country of origin.
Languages supported by the administrator console.

User Management

Console for accessing email quarantine and user settings.
Spam release
Releases Spam from the quarantine delivering it into the mailbox.
Daily Report
Daily Spam report delivered to the inbox.
Spam settings, policies and rules configurable as per user.
Managing a list of blocked senders or blacklist.
Managing a list of approved senders or whitelist.
Multi-language support
Language supported by the user console.
Country of Origin
Search spam by country of origin.
Attachment filter
Search Spam by attachments.

Service & Infrastructure

Service Status
Email security providers typically have multiple data centers, this status covers just one of them. Checks service status near real-time with a 1 minute interval.
Last Downtime
Latest downtime of the Email service recorded. Checks service status near real-time with a 1 minute interval.
Last 24h.
Average uptime during the last 24 hours. Information updated with a 1 minute interval.
Last 7 Days
Average uptime during the last 7 days. Information updated with a 1 minute interval.
Last 30 days
Average uptime during the last 7 days. Information updated with a 1 minute interval.
Downtime Alert
Register here to receive an automatic generated email when the service goes down. will not add your email to our emailing list and you will only receive service update emails if the service experiences any downtime.
Cancel Alert
Submit your email here to cancel 'Downtime Alert' subscription.
Refresh Latency
Refresh cycle latency as specified by the SLA.
Availability SLA
Service availability as specified by the SLA.
Data Centers
Data Center locations. Email service providers typically have multiple data center locations. Different geographical options allow for a better compliance with local laws and improved latency.
Hosting Select
Option to select data center to provision service from.
ISO 27001
ISO 27001 has emerged as the de-facto standard to ensure international best practice - Information Security Management Standard (ISMS). ISO/IEC 27001 is part of the 27000 family.
Tier III
Tier III data centers are composed of multiple active power and cooling distribution paths. However, only one path is active, has redundant components, and is concurrently maintainable, providing typically 99.982% availability.

Technical Support

24/7 Technical support included at no extra cost.
24/7 Phone line access.
Online Chat
Online technical support chat available.
Real-time status updates providing information on service uptime/downtime.
Technical support languages supported over the phone.
Knowledge Base
Knowledge Base available for customers.
LDAP Support
Offered for a better support experience, Active Directory (LDAP) is the preferred option for provisioning new user accounts. It offers a great support option for troubleshooting and quick deployment needs.

User Ratings

User Ratings user ratings on product.
Links to a Spiceworks product review and user ratings.
Spiceworks Rating user ratings on product pricing.
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