Resend a .eml file (useful for testing message loading in Mail.app)

send-eml.py

#!/usr/bin/env python
# -*- mode: python; coding: utf-8-unix -*- 
import sys
import os.path
import smtplib

def remove_headers(raw_message, headers=[]):
    message = []
    i = 0
    for line in raw_message:
        if line.strip() == "":
            break
        i += 1
        skip = False
        for h in headers:
            if line.lower().startswith(h.lower()):
                skip = True
                break
        if skip:
            continue
        message.append(line)
    
    message += raw_message[i:]
    
    return message

def send_message(filename):
    global smtpserver
    
    if not os.path.isfile(filename):
        print('File "' + filename + '" not found.')
        sys.exit(0)
    with open(filename) as f:
        message = f.readlines()
    
    message = remove_headers(message, ["From:", "To:", "CC:", "BCC:", "Date:", "Message-ID:", "X-"])
    message = "".join(message)
    
    print "From: %s" % (mailfrom)
    print "To: %s" % (rcptto)

    try:
        smtpserver.sendmail(mailfrom, rcptto, message)
    except Exception as e:
        print('Failed to send mail.')
        print(str(e))
    else:
        print('Succeeded to send mail.')

if len(sys.argv) <= 2:
    print('Usage:')
    print('  $ python ' + sys.argv[0] + ' mailfrom rcptto <emlfile>')
    print
    print('Parameter:')
    print('  mailfrom: MAIL FROM address.')
    print('  rcptto:   RCPT TO address.')
    print('  emlfile:  Message file in eml format. When emlfile is not specified, an empty message will be send.')
    print
    print('Example:')
    print('  $ python ' + sys.argv[0] + ' [email protected] [email protected] mail.eml')
    sys.exit(0)

server = 'localhost'
port = 25
mailfrom = sys.argv[1]
rcptto = sys.argv[2].split(',')

message = ''
if len(sys.argv) >= 4:
    filenames = sys.argv[3:]
    # if not os.path.isfile(filename):
    #     print('File "' + filename + '" not found.')
    #     sys.exit(0)
    # with open(filename) as f:
    #     message = f.readlines()

try:
    smtpserver = smtplib.SMTP("smtp.gmail.com", 587)
    smtpserver.set_debuglevel(1)
    smtpserver.ehlo()
    smtpserver.starttls()
    smtpserver.ehlo()
    smtpserver.login('user', 'pass')
    for filename in filenames:
        send_message(filename)
except Exception as e:
    print('Failed to send mail.')
    print(str(e))
else:
    print('Succeeded to send mail.')
finally:
    if smtpserver != None:
        smtpserver.close()

@rorviksam

Thanks for your solution with curl ... today it helped me out big time! :-)