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Pigeonhole.Sieve.Extensions.Editheader.txt
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Pigeonhole Sieve: Editheader Extension ====================================== The *editheader* extension (RFC5293 [http://tools.ietf.org/html/rfc5293/]) enables Sieve scripts to delete and add message header fields, thereby allowing interaction with other components that consume or produce header fields. Configuration ------------- The *editheader* extension is not available by default and needs to be enabled explicitly by adding it to the 'sieve_extensions' setting. The following settings can be configured for the *editheader* extension (default values are indicated): sieve_editheader_max_header_size = 2048 : The maximum size in bytes of a header field value passed to the 'addheader' command. The minimum value for this setting is 1024 bytes. The value is in bytes, unless followed by a k(ilo). sieve_editheader_forbid_add = : A space-separated list of headers that cannot be added to the message header. Addition of the 'Subject:' header cannot be prohibited, as required by the RFC specification. Therefore, adding this header to this setting has no effect. sieve_editheader_forbid_delete = : A space-separated list of headers that cannot be deleted from the message header. Deleting the 'Received:' and 'Auto-Submitted:' fields is always forbidden, while removing the 'Subject:' header cannot be prohibited, as required by the RFC specification. Therefore, adding one of these headers to this setting has no effect. sieve_editheader_protected = : A space-separated list of headers that cannot be added to or deleted from the message header. This setting is provided for backwards compatibility. It is a combination of the 'sieve_editheader_forbid_add' and 'sieve_editheader_forbid_delete' settings. The same limitations apply. Invalid values for the settings above will make the Sieve interpreter log a warning and revert to the default values. Example ------- ---%<------------------------------------------------------------------------- plugin { # Use editheader sieve_extensions = +editheader # Header fiels must not exceed one kilobyte sieve_editheader_max_header_size = 1k # Protected special headers sieve_editheader_forbid_add = X-Verified sieve_editheader_forbid_delete = X-Verified X-Seen } ---%<------------------------------------------------------------------------- (This file was created from the wiki on 2019-06-19 12:42)