Gmail Sent email LIMIT

[Johnse]

Hello,

I created a program, it sends email fine.
However there is a limit (100) in the number of emails it can send before it crashed and gives
an error.

Does someone know what is going on ?
Thanks !

server = smtplib.SMTP('smtp.gmail.com', 587)
    server.ehlo()
    server.starttls()
    server.login(gmail_sender, gmail_passwd)
    BODY = '\r\n'.join(['To: %s' % TO, 'From: %s' % gmail_sender, 'Subject: %s' % SUBJECT, '', TEXT])
    server.sendmail(gmail_sender, [TO], BODY)

the error message is.

Error:
  File "C:\ProgramData\Anaconda3\lib\smtplib.py", line 398, in getreply
    raise SMTPServerDisconnected("Connection unexpectedly closed")
SMTPServerDisconnected: Connection unexpectedly closed