
Chapter 3 – SMTP/POP3 Email Services
Multi-Tech Systems, Inc. AT Commands for Wireless Modems with IP Connectivity (S000333B) 19
#SMTPSERV Set SMTP Server Address
Definition: To send email messages the TCP/IP stack software must know the address of the SMTP server that is
to be used. In most cases, the local ISP maintains the SMTP server.
Values: 32-bit number in dotted-decimal notation (i.e., xxx.xxx.xxx.xxx) or
Alphanumeric ASCII text string up to 120 characters if DNS is available. No default.
Syntax: Set Value: AT#SMTPSERV=<value>
Get Value: AT#SMTPSERV? or AT#VSMTP, AT#VALL
#SMTPUN Set SMTP User Name
Definition: To send email messages, some SMTP servers use an authentication process. In these cases, the
TCP/IP stack software will provide the SMTP user name (associated with a SMTP password) for the
email sending process.
If this parameter is an empty string, the authentication mode is inactive.
If both this parameter and the SMTPPW parameter are not empty, the authentication mode is active.
Values: Alphanumeric ASCII text string up to 64 characters. No default.
Syntax: Set Value: AT#SMTPUN=<value>
Get Value: AT#SMTPUN? or AT#VSMTP, AT#VALL
#DNSSERV1 Set DNS Server IP Address
Definition: In order to translate the server names from literal format into IP addresses, the TCP/IP stack software
implements the Domain Name System (DNS) protocol. The DNS Server IP address must be specified
for use by the TCP/IP stack software.
Values: 32-bit number in dotted-decimal notation (i.e., xxx.xxx.xxx.xxx). Default 0.0.0.0
Syntax: Set Value: AT#DNSSERV1=<value>
Get Value: AT#DNSSERV1? or AT#VDNS, AT#VALL
#DNSSERV2 Set Secondary DNS Server
Definition: In order to translate the server names from literal format into IP addresses, the TCP/IP stack software
implements the Domain Name System (DNS) protocol. The DNS Server IP address has to be specified
for use by the TCP/IP stack software. This secondary DNS server is used in the case where the primary
DNS server does not respond to a request.
Values: 32-bit number in dotted-decimal notation (i.e., xxx.xxx.xxx.xxx). Default 0.0.0.0
Syntax: Set Value: AT#DNSSERV2=<value>
Get Value: AT#DNSSERV2? or AT#VDNS, AT#VALL
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