6/5/2023 0 Comments Spamassassin testing![]() ![]() If the probability was greater than 0.9, the message was considered spam.Īccording to Graham, the advantage of this statistical approach is that it refers to something real – the probability of being spam – and worked with both neutral and spam-indicating words. By examining the top 15 tokens in the header and body of each new email message, he calculated the possibility that it was spam. Graham’s solution was to parse his samples of spam and non-spam into tokens, or individual words, and use Bayesian tools to assign each token the possibility that it indicates spam, biasing them slightly in favor of not being spam to minimize false positives. After trying to develop filters based on the identifying characteristics of spam, Graham concluded that beyond a certain point, the more rules he added, the more false positives he obtained – that is, the more email messages that were incorrectly identified as spam. However, to make an informed choice between spam filters requires considerably more detail.īogofilter has its roots in “ A Plan for Spam,” a 2002 essay by English developer Paul Graham. The more suspect words contained in an email, the greater the chances it is spam. More specifically, both apply Bayes’ work by collecting words and assigning a probability that each word indicates spam. To call them Bayesian means nothing more than their structure is based on the the 18th century work of Thomas Bayes in statistics and probability. ![]() In fact, learning that Bogofilter and SpamAssassin are “Bayesian” is useless for choosing between them. Instead, most users simply nod solemnly when they read that both involve “Bayesian filtering.” Most of us – including many who use the phrase – have no idea what Bayesian filtering is, but it sounds scientific and reassures us that either choice is acceptable. However, what is less often discussed is which filter is the best to use in which circumstances. Although a few other choices (e.g., SpamBayes) are available, when an email reader offers a plugin, it is almost always for either Bogofilter or SpamAssassin. Other choices, like DSPAM, are no longer in development. Note: Plesk application debug should be enabled in the registry: set the value of the DWORD parameter debug to 1 in HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\PLESK\PSA Config\Config.These days, the choice of spam filters comes down to Bogofilter and SpamAssassin. The file that already contains a special string and provided by Kaspersky Labs: Īlternatively attach a test file with file extension ".com" that contains this special string:ĬONFIG_TEXT: Plesk for Windows, the results can be seen in the file %plesk_dir?min\logs\plesklog_avstat.log. To test Kaspersky Antivirus, Plesk Premium Antivirus or any other antivirus download and attach to email special test file: eicar.zip. * 0.0 TVD_SPACE_RATIO No description available. * 1000 GTUBE BODY: Generic Test for Unsolicited Bulk Email * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * -100 USER_IN_WHITELIST From: address is in the user's white-list Detailed information about scores can be found in an email header. So, even if a mailbox is in the whitelist, mail still be detected as spam because whitelisted email gets -100 scores. While testing, note that Gtube test email gives 1000 scores to spam. Note: The test email should be sent from a mailbox that is not located on the server. To test SpamAssassin, it is necessary to send a test email containing the following string of characters in the message body (in upper case and with no spaces or line breaks):ĬONFIG_TEXT: XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X Where to see if the message is blocked by antivirus? Answer SpamAssassin How to test SpamAssassin or Kaspersky and Plesk Premium Antivirus antiviruses? Unable to send message from Roundcube: SMTP Error (-1): Connection to server failed.Unable to send emails or create a mailbox: Error: mailmng-outgoing failed: ERROR:outgoing:mails.domain_id may not be NULL.Unable to reissue certificate for webmail when SSL/TLS support disabled: An error happened while reissuing the certificate: Validation failed.How to enable additional webmail logging on Plesk server?.RoundCube shows error when sending email with attachment: An error occurred: Request timed out.Unable to send emails to Mailman mail list: Recipient address rejected: User unknown in virtual mailbox table.Incoming emails are not delivered on Plesk server: /usr/bin/deliverquota: No such file or directory. ![]() ![]()
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