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Posted on March 1, 2020
SMTP (Simple Mail Transfer Protocol) i.e., Simple Mail Transfer Protocol, which is a set of rules for transmitting from the source address to the destination address of the message, it an internet protocol.
The python smtplib provides a very convenient way to send e-mail. It smtp protocol for a simple package. You can use pip to install it.
Python create an SMTP object syntax is as follows:
import smtplib
smtpObj = smtplib.SMTP ([host [, port [, local_hostname]]])
Parameter Description:
- Host: SMTP server host. You can specify the host ip address or domain name such as: gmail, this is an optional parameter.
- Port: If you provide a host parameters, you need to specify the port number used by the SMTP service, under normal circumstances SMTP port number is 25.
- Local_hostname: If the SMTP on your local machine, you only need to specify the server address is localhost.
Python SMTP object to send mail using sendmail method syntax is as follows:
SMTP.sendmail (from_addr, to_addrs, msg [, mail_options, rcpt_options]
Parameter Description:
- from_addr: e-mail sender address.
- to_addrs: string list, send e-mail address.
- msg: Send a message
Here we must note that the third argument, msg is a string that represents the mail.
We know that the email message is generally composed of a title, sender, recipient, message content, attachments.
When sending mail, pay attention to msg format. This is a string, but the format is the format smtp defined in the protocol.
smtp examples
The following is a Python to send mail using a simple example:
#!/usr/bin/python3
import smtplib
sender = 'from@fromdomain.com'
receivers = [ 'to@todomain.com']
message = "" "From: From Person <from@fromdomain.com>
To: To Person <to@todomain.com>
Subject: SMTP e-mail test
This is a test e-mail message.
"" "
try:
smtpObj = smtplib.SMTP('localhost')
smtpObj.sendmail(sender, receivers, message)
print("Successfully sent email")
except SMTPException:
print("Error: unable to send email")
send HTML formatted email Python
Python is different from the message transmitted HTML email message and sending plain text is set to the MIMEText. Specific code as follows:
import smtplib
from email.mime.text import MIMEText
mailto_list = [ "YYY@YYY.com"]
mail_host = "smtp.XXX.com" # Set the server
mail_user = "XXX" # Username
mail_pass = "XXXX" # password
mail_postfix = "XXX.com" # suffix Outbox
def send_mail (to_list, sub, content): #to_list: Recipient; sub: Theme; content: the content of the message
me = "hello" + "<" + mail_user + "@" + mail_postfix + ">" # hello herein can be arbitrarily set, on receipt, in accordance with the setting display
msg = MIMEText(content, _subtype = 'html', _ charset = 'gb2312') # create an instance, the message format provided here html
msg ['Subject'] = sub # Settings topic
msg ['From'] = me
msg ['To'] = ";". join(to_list)
try:
s = smtplib.SMTP()
s.connect(mail_host) # smtp server connection
s.login(mail_user, mail_pass) # login server
s.sendmail(me, to_list, msg.as_string()) # Send e-mail
s.close()
return True
except Exception, e:
print(str(e))
return False
if __name__ == '__main__':
if send_mail (mailto_list, "hello", "<a href='http://www.dev.to/'> dev.to </a>"):
print("successfully sent")
else:
print("failed to send")
Or you can specify in the message body Content-type: text / html, the following example:
#!/usr/bin/python3
import smtplib
message = "" "From: From Person <from@fromdomain.com>
To: To Person <to@todomain.com>
MIME-Version: 1.0
Content-type: text / html
Subject: SMTP HTML e-mail test
This is an e-mail message to be sent in HTML format
<B> This is HTML message. </ B>
<H1> This is headline. </ H1>
"" "
try:
smtpObj = smtplib.SMTP('localhost')
smtpObj.sendmail(sender, receivers, message)
print("Successfully sent email")
except SMTPException:
print("Error: unable to send email")
Python send mail with attachments
Send e-mail with attachments, you first create MIMEMultipart() instance and construction attachments, if there are multiple attachments, you can turn structure. Finally, smtplib.smtp sent.
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
import smtplib
# Create an instance with attachments
msg = MIMEMultipart()
# Structure Annex 1
att1 = MIMEText(open (. 'example.zip', 'rb') read (), 'base64', 'gb2312')
att1 ["Content-Type"] = 'application / octet-stream'
att1 ["Content-Disposition"] = 'attachment; filename = "example.zip"' # where filename can be any write, write what name, what name appears in the message
msg.attach (att1)
# Structure Annex 2
att2 = MIMEText(open (. 'example.txt', 'rb') read (), 'base64', 'gb2312')
att2 ["Content-Type"] = 'application / octet-stream'
att2 ["Content-Disposition"] = 'attachment; filename = "example.txt"'
msg.attach (att2)
# Plus headers
msg ['to'] = 'YYY@YYY.com'
msg ['from'] = 'XXX@XXX.com'
msg ['subject'] = 'hello world'
#send email
try:
server = smtplib.SMTP ()
server.connect( 'smtp.XXX.com')
server.login( 'XXX', 'XXXXX') # XXX user name, XXXXX is password
server.sendmail(msg ['from'], msg ['to'], msg.as_string ())
server.quit()
print('transmission success')
except Exception, e:
print(str(e))
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Posted on March 1, 2020
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