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FAQs & Knowledge Base

Welcome to our Knowledge Base. Search or browse through the topics below to find answers to your questions.

Categories: SpamAssassin in a Box | Show all categories

Rebooting the system fixes this error. To prevent it entirely run the SpamAssassin service with administator privileges.

Search in C:\ProgramData\Microsoft\Crypto\RSA\ and all subfolders for the folowwing files:

1.     19c988cf76b533f74aaffc201e63f98e_0d5fcf7f-9733-4ba0-a71e-c5b558768432

2.     f686aace6942fb7f7ceb231212eef4a4_018e9184-1f67-46e7-b4c1-c3539d31c630

Make sure that the user under which the Exchange Server Toolbox service is running has full access on these files.

In general adding whitelist entries in SpamAssassin can be done by creating a custom SpamAssassin cf

For whitelisting a single address you may use one of the following syntax


whitelist_from user@domain.tld


whitelist_from *@domain.tld

to whitelist all senders from a single domain.


We recommend to create a new cf-file at  C:\ProgramData\JAM Software\spamdService\sa-config

and name it e.g. xWhitelist.cf. That way your custom whitelist will be parsed quite late during startup, thus preventing that any of your settings gets overridden by another config file. Please note that you

have to manually restart SpamAssassin Daemon control service to apply your changes.


You'll find a lot of information on the official docs or SpamAssassin Wiki.

Please run the setup of the licensed full version.
Please do not uninstall the previous installed trial version.
All settings will be retained.

Yes, the SpamAssassin used checks SPF records. The default settings for SPF can be found in 25_SPF.cf or the corresponding scores in 50_scores.cf. If you are using "Exchange Server Toolbox" the best way to set your own scores is to use the built-in editor for creating custom SpamAssassin config files which you can find under Spam Options.

For more information about the options, see:

Alternatively, you can manually create your own .cf file in which you define your "rules", this should only come last alphabetically, since SpamAssassin will evaluate the cf files in numerical-alphabetical order. (For example XMySettings.cf).

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