Chapter 3 – SMTP/POP3 Email Services
Multi-Tech Systems, Inc. AT Commands for Wireless Modems with IP Connectivity (S000333D)
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#SMTPPORT Set SMTP Server Port
Definition:
To reach the SMTP server, the TCP/IP stack software must know the port of the SMTP server used for
sending email.
Note:
This parameter should be changed only by your network administrator since it depends on
network infrastructure configuration including firewalls, proxy or specific TCP port translation settings.
Values:
From 1 to 5 digits (each digit between 0 and 9 inclusive). Note that numbers above 65,535 are illegal
as the port identification fields are 16 bits long in the TCP header.
Default 25.
Syntax:
Set Value: AT#SMTPPORT=<value>
Get Value: AT#SMTPPORT? or AT#VSMTP, AT#VALL
#SMTPPW Set SMTP Password
Definition:
To send email messages, some SMTP servers are using an authentication process. In these cases, the
TCP/IP stack software will provide the SMTP password (associated to the SMTP user name) for the
email sending process.
If this parameter is an empty string, the authentication mode is inactive.
If both this parameter and the SMTPUN parameter are not empty, the authentication mode is active.
Values:
Alphanumeric ASCII text string up to 64 characters.
No default.
Syntax:
Set Value: AT#SMTPPW=<value>
Get Value: AT#SMTPPW? or AT#VSMTP, AT#VALL
#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