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Part 1 – AT Commands for All Universal IP Devices Chapter 2 – SMTP AT Commands
Universal IP AT Commands Reference Guide (Document S000457K) 24
#PUTMAIL – Send Mail to Recipient with Interactive Mode
Description: This command allows the attached host to send an email message containing body text passed
to the TCP/IP stack over the serial port. Once an IP link is established, the attached host can
send an email message at any time (except when the TCP/IP stack software is already in a
process using TCP resources).
The header of this email is built using the REC1, CCREC1 and SUBJ1 parameters.
This command is similar to a “send email” operation issued by a standard messaging client on a
PC.
Syntax: AT#PUTMAIL
IMPORTANT NOTE:
You must issue the <CR><LF> bytes (binary value: 0D 0A) as the first data bytes if a header is
NOT being constructed in order to finish the internal headers correctly. This mechanism is in
place to allow for the addition of custom headers such as MIME data.
Command
Possible Responses
AT#PUTMAIL
Note: You have to configure only
receiver address1, copy address1, and
subject1 before or during the session,
but content (body) of the email is typed
when the TCP/IP session is
established. Content is not echoed.
Ok_Info_WaitingForData
Notes: An SMTP session has been successfully opened
with the remote SMTP server.
Once the TCP/IP stack has displayed this message,
all the data received on the serial port is sent within
the email body.
The (CR)(LF)(.)(CR)(LF) sequence sent by the
attached host indicates the TCP/IP stack the end of
the email body.
<CR><LF>
Note: See Important Note above.
<content>
Note: Content is not written when
typing
<CR><LF> . <CR><LF>
Note: Termination sequence
<CR> = <Enter>, <LF> = <Ctrl Enter>
OK
Note: The mail has been successfully sent.
AT#PUTMAIL
#CME ERROR: 38027
Notes: The address of the SMTP server has not been
resolved by the secondary DNS server.
TCP/IP stack is not able to reach the primary or
secondary DNS servers or a wrong SMTP server
address has been entered.
AT#PUTMAIL
#CME ERROR: <value>
Notes: An error has occurred during the communication with
the remote SMTP server. It may also happen during
the data transfer (after the OK message).
This error can be due to one of the following
reasons:
- DNS servers are not able to resolve the SMTP
server address.
- SMTP server is temporarily out of service.
- Authentication (SMTPUN, SMTPPW) is not valid.
- An email address specified in REC1 or CCREC1
is not valid.
- n = inactivity period of 50 seconds on the serial
port.
See section ‘Response messages and error codes’
To view parameters, use #VMAIL and #VSMTP. They are also listed in #VMAILi (where i = 1, 2, or 3)