EX_USAGE
merr(EX_USAGE, "usage: mail.local [-Ll] [-f from] user ...");
merr(EX_USAGE, "multiple -f options");
exit(EX_USAGE);
exit(EX_USAGE);
exit(EX_USAGE);
errx(EX_USAGE, "sender address contains a line break");
errx(EX_USAGE, "recipient address contains a line break");
errx(EX_USAGE, "DSN NOTIFY value contains a line break");
errx(EX_USAGE, "DSN RET value contains a line break");
errx(EX_USAGE, "DSN ENVID value contains a line break");
case EX_USAGE: