GNU Linux

Release hold queue email in Postfix – postsuper

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Postfix logo

How to flush Postfix’ mail queue from the command line and delete all mail from the queue? Easy, use the Postfix postsuper command as explained in this post. The postsuper command controls different types of queues in the Postfix mail system, like the deferred or hold queue. This post shows you some Postfix queue operations […]

Code base

Add (custom) headers to MailMessage class

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How to add custom headers to System.Net.Mail? When sending an email using the MailMessage class (System.Net.Mail namespace) in an ASP.NET website, certain email headers like Message-ID are not always set. When a Message-ID header is missing, email might be blocked by the recipients SMTP server. Therefore it is necessary to set such headers…

Security

Encrypt email with PGP – GnuPG

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How to encrypt email with PGP (GnuPG) to protect and secure your online privacy. The last few weeks a lot is said about government privacy infringement programs like the NSA’s program Prism and UK GCHQ’s Tempora… Did you know you can easily protect your privacy, identity and your data transmissions by encryption?