All ezmlm replies, except errors handled directly by qmail, can be sent in any character set and optionally with quoted-printable or base64 content-transfer-encoding. DIR/text/ files are always 8-bit files, but even though qmail has no problems with 8-bit mail, other MTAs and MUAs do. Problems due to this can be avoided by assuring that outgoing ezmlm messages are 7bit by using the appropriate content-transfer-encoding.
To specify a character set, put the name in DIR/charset (default: us-ascii). To specify quoted-printable or base64 content-transfer-encoding, add ‘:Q’ or ‘:B’ after the character set name in DIR/charset.