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Tag: spam

Fight against spam part 5 – Dovecot Sieve

2016-12-04 BigRetroMike Leave a comment

From previously posts we started using 4 different technologies to stop spam from reaching our server or being scanned by…

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Posted in: IT Tutorial Filed under: dovecot, email, mail, postfix, sieve, spam, spamassassin

Fight against spam part 4 – Postfix SpamAssassin

BigRetroMike Leave a comment

SpamAssasin is the last weapon from our arsenal that we will use to keep spam away from our mail server.…

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Posted in: IT Tutorial Filed under: linux, postfix, spam, spamassassin

Fight against spam part 3 – Postfix DMARC

BigRetroMike Leave a comment

Domain-based Message Authentication, Reporting and Conformance (DMARC) is an email validation system designed to detect and prevent email spoofing. It…

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Posted in: IT Tutorial Filed under: dkim, dmarc, postfix, spam, spf

Fight against spam part 2 – Postfix DKIM

BigRetroMike Leave a comment

DomainKeys Identified Mail (DKIM) – is an email authentication method designed to detect email spoofing by providing a mechanism to…

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Posted in: IT Tutorial Filed under: dkim, keys, klucze, opendkim, postfix, spam

Fight against spam part 1 – Postfix SPF

BigRetroMike Leave a comment

Sender Policy Framework (SPF) –  is a simple email-validation system designed to detect email spoofing by providing a mechanism to…

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Posted in: IT Tutorial Filed under: postfix, spam, spf

Linux – Monitoring sendmail function (php) usage

2016-07-03 BigRetroMike Leave a comment

Often we can encounter server that started to send spam (infected page, virus inside php file, bad plugin). If its…

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Posted in: IT Tutorial, Linux daily Filed under: antispam, linux, log, php, sendmail, spam, wrapper
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