Send Email to multiple recipients from .txt file with Python smtplib

Question

I try to send mails from python to multiple email-addresses, imported from a .txt file, I\'ve tried differend syntaxes, but nothing would work...

The code:

Answer 1

It needs to be a real list. So, with this in the file:

recipient@mail.com,recipient2@mail.com,recipient3@mail.com

you can do

mailList = urlFile.read().split(',')

Answer 2

urlFile = open("mailList.txt", "r+")
mailList = [i.strip() for i in urlFile.readlines()]

and put each recipient on its own line (i.e. separate with a line break).

Answer 3

The sendmail function requires a list of addresses, you are passing it a string.

If the addresses within the file are formatted as you say, you could use eval() to convert it into a list.

Answer 4

to_addrs in the sendmail function call is actually a dictionary of all the recipients (to, cc, bcc) and not just to.

While providing all the recipients in the functional call, you also need to send a list of same recipients in the msg as a comma separated string format for each types of recipients. (to,cc,bcc). But you can do this easily but maintaing either separate lists and combining into string or convert strings into lists.

Here are the examples

TO = "1@to.com,2@to.com"
CC = "1@cc.com,2@cc.com"
msg['To'] = TO
msg['CC'] = CC
s.sendmail(from_email, TO.split(',') + CC.split(','), msg.as_string())

or

TO = ['1@to.com','2@to.com']
CC = ['1@cc.com','2@cc.com']
msg['To'] = ",".join(To)
msg['CC'] = ",".join(CC)
s.sendmail(from_email, TO+CC, msg.as_string())

Answer 5

This question has sort of been answered, but not fully. The issue for me is that "To:" header wants the emails as a string, and the sendmail function wants it in a list structure.

# list of emails
emails = ["banjer@example.com", "slingblade@example.com", "dude@example.com"]

# Use a string for the To: header
msg['To'] = ', '.join( emails )

# Use a list for sendmail function
s.sendmail(from_email, emails, msg.as_string() )