Token char MTA option

SRS MTA options:  (integer position of ASCII character)
RESTRICTED.

The  MTA option controls what character represents a token in the local-part of addresses. This is relevant for SRS address handling. The value of this option is an integer corresponding to the ASCII character value in decimal. The default is 61, corresponding to the equal sign,.

See also:
 * Alias and address MTA options
 * SRS MTA options