puremail

var (
	ErrLenMax             = errors.New("too many characters")
	ErrManyA              = errors.New("to many @")
	ErrInvalidLogin       = errors.New("invalid email login")
	ErrInvalidLoginChars  = errors.New("invalid email login characters")
	ErrInvalidDomain      = errors.New("invalid email domain")
	ErrInvalidDomainChars = errors.New("invalid email domain characters")
	ErrEndToTag           = errors.New("end to tag")
	ErrEndToEOF           = errors.New("end to EOF")
	ErrPanic              = errors.New("catch panic")

	ErrTooShort  = errors.New("payload is too short")
	ErrCRC       = errors.New("CRC‑32 mismatch")
	ErrMalformed = errors.New("malformed payload")

	ErrNilMX         = errors.New("no MX records found")
	ErrToManyLookups = errors.New("too many lookups")
)

var DefaultConfig = &ConfigObj{
	NoCache: true,
	MX: ConfigMxObj{
		TllPos:       6 * time.Hour,
		TllNeg:       15 * time.Minute,
		RefreshAhead: 10 * time.Minute,

		TimeoutDns:      400 * time.Millisecond,
		TimeoutDnsBurst: 2 * time.Second,
		TimeoutRefresh:  90 * time.Second,

		ShardAbs:     4,
		ShardMaxSize: 10_000,

		ConcurrencyLimitLookupMX: 250,
	},

	Ctx: context.Background(),
}