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Sieve filters are now available on Stalwart JMAP v0.2

· 2 min read
Mauro D.

Sieve (RFC5228) is a scripting language for filtering email messages at or around the time of final delivery. It is suitable for running on a mail server where users may not be allowed to execute arbitrary programs as it has no user-controlled loops or the ability to run external programs. Sieve is a data-driven programming language, similar to earlier email filtering languages such as procmail and maildrop, and earlier line-oriented languages such as sed and AWK: it specifies conditions to match and actions to take on matching.

Today Stalwart JMAP v0.2 was released including support for the for JMAP for Sieve Scripts draft. Additionally, ManageSieve support was added to Stalwart IMAP v0.2.

Stalwart JMAP safely runs Sieve scripts in a controlled sandbox that ensures that programs do not exceed or abuse their allocated system resources.

Unlike other mail servers that offer limited support for Sieve extensions, Stalwart JMAP supports all existing Sieve extensions including: