The address-separator configuration variable

address-separator is the character that separates the username from the subaddress in a localpart, e.g. the + in This setting is relevant only if use-subaddressing is enabled.

Archiveopteryx completely disregards the subaddress (the part between + and @) when delivering the mail.

If the subaddress is set to an empty string (this is the default), then both + and - are accepted as subaddresses. We recommend using the default. The RFC mandates + as default, but many people use -. So much software (particularly web forms) disallows + that we too think - is better, and thus our default setting supports both.

address-separator is a string. Its default value is an empty string.

You can see its current value with the command aox show cf address-separator.

String syntax

Strings may be written as a single unquoted word or quoted with either single or double quotes, as shown in these three examples:

db-password = single.word
db-password = "rock'n'roll" # a 12-character password
db-password = 'two words, quoted' # a 17-character one

Only single-line strings can be used. Single-word strings may contain the characters a-z, A-Z, 0-9, dot, hyphen and slash.

Spaces are allowed at the start of the line, before and after '=', and after the value. Comments extend from '#' to the end of the line.

In case of questions, please write to

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Last modified: 2010-11-19