package config import "errors" var _ Validator = (*MailConfig)(nil) type MailConfig struct { Host string Port int SSL bool AuthType string Username string Password string From string } func (m MailConfig) Validate() error { if m.Host == "" { return errors.New("host is required") } if m.Username == "" { return errors.New("username is required") } if m.Password == "" { return errors.New("password is required") } if m.From == "" { return errors.New("from is required") } return nil }