imap-zlib plugin

See IMAP Compression for an overview of Dovecot’s IMAP compression support.

Settings

imap_compress_<algorithm>_level

• Default: <algorithm dependent>

• Values: Unsigned integer

Changed in version v2.3.15.

Defines the compression level for the given algorithm.

Per the RFC, only the deflate algorithm is currently supported.

Algorithm	Minimum	Default	Maximum
deflate	0 (no compression)	6	9

imap_zlib_compression_level