sending random messages with smtplib python

I want to send random messages using smtplib in python, I wrote this code:

import random, string, smtplib


def generator():
    return ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(8))

def login():
    try:
        global email, server
        email = ''
        pswd = ''
        smtp_server = 'smtp.gmail.com'
        port = 587
        server = smtplib.SMTP(smtp_server,port)
        server.ehlo()
        if smtp_server == "smtp.gmail.com":
            server.starttls()
        server.login(email,pswd)

    except smtplib.SMTPAuthenticationError:
        print('error')

def send():
    try:
        recipient = ''
        message = generator()
        count = 10
        lol = 0
        while lol < count:
            lol+=1
            server.sendmail(email,recipient,message)
            print('done')

    except smtplib.SMTPAuthenticationError:
        print('error')

login()
send()

I've received the messages but with the same string, I also tried to make a list of random strings and then make the message variable chose randomly from there using random.choice() but it didn't work either.

What could the problem be?