Python sends mail using SMTP

The SMTP (Simple Mail Transfer Protocol) is simply the message Transfer Protocol, which is a set of rules for sending mail from the source address to the destination, and it controls the way the letters are relayed.

Python's Smtplib provides a convenient way to send e-mails. It provides a simple encapsulation of the SMTP protocol.

Python creates SMTP object syntax as follows:

Import Smtplib smtpobj = Smtplib. SMTP ([host [, Port [, Local_hostname]])

Parameter description:

HOST:SMTP Server host. You can specify the IP address of the host or the domain name such as: Ziqiangxuetang.com, which is an optional parameter.

PORT: If you provide the host parameter, you need to specify the port number that the SMTP service uses, and the SMTP port number is typically 25.

Local_hostname: If SMTP is on your local computer, you only need to specify the server address as localhost.

The Python SMTP object uses the SendMail method to send the message with the following syntax:

Smtp.sendmail (From_addr, To_addrs, msg[, Mail_options, Rcpt_options]

Parameter description:

From_addr: Mail Sender address.

To_addrs: String list, mailing address.

Msg: Send Message

Notice here that the third parameter, MSG, is a string that represents the message. We know that the mail is generally composed of the title, sender, recipient, mail content, attachments, etc., when sending mail, pay attention to the format of MSG. This format is the format defined in the SMTP protocol.

Instance

Here's a simple example of sending a message using Python:

#!/usr/bin/python Import smtplib sender = ' from@fromdomain.com ' receivers = [' to@todomain.com '] message = "" "From:from Per Son <from@fromdomain.com>to:to person <to@todomain.com>subject:smtp e-mail test this is a test e-mail Messag E. "" Try:   smtpobj = Smtplib. SMTP (' localhost ')   smtpobj.sendmail (sender, receivers, message)            print "successfully sent email" except Smtpexception:   print "error:unable to send Email"

Use Python to send HTML-formatted messages

Python sends HTML-formatted messages differently than messages that send plain text messages by setting _subtype in Mimetext to HTML. The specific code is as follows:

Import smtplib from Email.mime.text import mimetext mailto_list=["YYY@YYY.com"] mail_host= "SMTP. xxx.com "#设置服务器mail_user =" XXX "#用户名mail_pass =" XXXX "#口令 mail_postfix=" xxx.com "#发件箱的后缀 def send_mail (to_list,sub,c ontent): #to_list: Recipient; sub: subject; Content: Message contents me= "Hello" + "<" +mail_user+ "@" +mail_postfix+ ">" #这里的hello可以任意设置,     After receiving the letter, it will follow the settings to display msg = Mimetext (content,_subtype= ' HTML ', _charset= ' gb2312 ') #创建一个实例, here set to HTML format mail msg[' Subject '] = Sub #设置主题 msg[' from ') = Me msg[' to '] = ";". Join (to_list) try:s = Smtplib. SMTP () s.connect (mail_host) #连接smtp服务器 s.login (mail_user,mail_pass) #登陆服务器 s.sendmail (Me, to_list , msg.as_string ()) #发送邮件 s.close () return True except Exception, E:print str (e) r Eturn False If __name__ = = ' __main__ ': If Send_mail (mailto_list, "Hello", "<a href=" Http://www.cnblogs.com/xiaowuyi ' > Small Five righteousness </a> ': print "send successfully" Else:print "Send Failed"

Alternatively, you can specify Content-type as text/html in the message body, as in the following example:

#!/usr/bin/pythonimport smtplib message = "" "From:from person <from@fromdomain.com>to:to person < TO@TODOMAIN.COM>MIME-VERSION:1.0CONTENT-TYPE:TEXT/HTMLSUBJECT:SMTP HTML e-mail test this was an e-mail message to be Sent in HTML format <b>this are HTML message.</b>
Python sends a message with an attachment

To send a message with an attachment, you first create an instance of Mimemultipart (), and then construct the attachment, which, if there are multiple attachments, can be constructed in turn and then sent using SMTPLIB.SMTP.

From Email.mime.text import mimetextfrom email.mime.multipart import Mimemultipartimport smtplib
#创建一个带附件的实例msg = Mimemultipart () #构造附件1att1 = mimetext (open (' D:\\123.rar ', ' RB '). Read (), ' base64 ', ' gb2312 ') att1[" Content-type "] = ' Application/octet-stream ' att1[" content-disposition "] = ' attachment; Filename= "123.doc" #这里的filename可以任意写, what name to write, what name is displayed in the message Msg.attach (ATT1) #构造附件2att2 = mimetext (open (' D:\\123.txt ', ' RB '). Read (), ' base64 ', ' gb2312 ') att2["content-type"] = ' application/octet-stream ' att2[' content-disposition '] = ' Attachment Filename= "123.txt" ' Msg.attach (ATT2) #加邮件头msg [' to '] = ' YYY@YYY.com ' msg[' from '] = ' XXX@XXX.com ' msg[' subject '] = ' Hello ' World ' #发送邮件try:    server = Smtplib. SMTP ()    server.connect (' SMTP. XXX.com ')    server.login (' XXX ', ' XXXXX ') #XXX为用户名, XXXXX for password    server.sendmail (msg[' from '), msg[' to '],msg.as_ String ())    server.quit ()    print ' sent successfully ' except Exception, E:      print str (e)
The following instance specifies the Content-type header as Multipart/mixed and sends a/tmp/test.txt text file:

#!/usr/bin/python Import smtplibimport base64 filename = "/tmp/test.txt" # reads the contents of the file and uses base64 encoding fo = open (filename, "RB") fil EContent = Fo.read () encodedcontent = Base64.b64encode (filecontent) # base64 sender = ' webmaster@tutorialpoint.com ' reciever = ' amrood.admin@gmail.com ' marker = "auniquemarker" BODY = "" "This is a test e-mail to the send an attachement." " # define Header information part1 = "" From:from person <me@fromdomain.net>to:to person <amrood.admin@gmail.com>subject: Sending attachementmime-version:1.0content-type:multipart/mixed; boundary=%s--%s "" "% (marker, marker) # define message Action Part2 =" "Content-type:text/plaincontent-transfer-encoding:8bit%s--%s" "% (Body,marker) # defines the nearby part part3 =" "" content-type:multipart/mixed; Name=\ "%s\" content-transfer-encoding:base64content-disposition:attachment; filename=%s%s--%s--"" "% (filename, filename, encodedcontent, marker) message = Part1 + part2 + part3 try:smtpobj = SMTP Lib. SMTP (' localhost ') smtpobj.sendmail (sender, reciever, message) print "SUccessfully sent email "except Exception:print" error:unable to send Email " 
"Recommended"

1. Detailed description Python uses SMTP to send mail instances

2. Python code summary for sending mail using SMTP

3. C # call QQ mailbox SMTP send mail modified version code

4. Share Python to implement SMTP send message graphics instances

5. PHP smtp Send mail

6. Python SMTP Mail module detailed

7. Python smtplib module sends SSL/TLS secure message instances

