SMTPRA & SMTPDA error 1053 When attempting to start the SMTPDA and SMTPRA service the following error is returned: Error 1503 -Service did not respond in a timely fashion. To solve this problem ensure that you are not using DHCP to assign your IP address. You must manually specify your IP address and DNS addresses within your TCP/IP Properties. MailSite 6.1 and later allows the use of Dynamic DNS addresses.