ServiceDesk parsing email sent using smtplib

Let me explain the situation: I send a letter using smtplib (code below) to ServiceDesk. The letter looks like this:

Subject: ~Bot~ subject
Body:
~~OPERATION=AddRequest~~
~~REQUESTER=FULL NAME~~

It is written in the parameters of ServiceDesk that it parses the information that is in ~. If you send a letter from mail (Outlook for example), then ServiceDesk parses everything normally, but if through smtplib it does not parse at all, the subject remains ~Bot~ subject instead of subject, and the sender is not substituted from the REQUESTER parameter.

Code:

import smtplib
from email.mime.text import MIMEText

to = 'servicedesk@my-domain.com'
gmail_user = 'servicedesk@my-domain.com'
gmail_pwd = 'password'
smtpserver = smtplib.SMTP("smtp.office365.com", 587)
smtpserver.ehlo()
smtpserver.starttls()
smtpserver.ehlo
smtpserver.login(gmail_user, gmail_pwd)

subject = "~Bot~ 123"

msg = MIMEText("~~OPERATION=AddRequest~~\r\n~~REQUESTER=FIO~~")
msg['From'] = gmail_user
msg['To'] = to
msg['Subject'] = subject

smtpserver.sendmail(gmail_user, to, msg.as_bytes())
smtpserver.close()

I tried to change the encoding when sending a message, but it didn't help. I also tried another library for sending letters, which also turned out to be unsuccessful. Perhaps I lack competence and I simply do not indicate some required parameter.

Tell me what the problem might be and how it can be fixed. Thank you!

from ServiceDesk parsing email sent using smtplib