pc to phone takes CLI input or clipboard and send it to a phone using provider sms gateway.

pc_to_phone.py

#! python

import smtplib
import pyperclip as clip
import sys
import os

def send_msg(message):
    print("Sending %s" % (message))
    message = "\r\n".join([
        "From: my-personal-email@gmail.com",
        "To: my-phone-number@vtext.com",
        message,
        "",
        ""
        ])
    server = smtplib.SMTP("smtp.gmail.com")
    server.ehlo()
    server.starttls()
    password = open("static\\token.tk", "rb").read().decode("UTF-8")
    server.login("my-personal-email@gmail.com", password)
    failed = server.sendmail("my-personal-email@gmail.com", ["my-phone-number@vtext.com"], message)
    if len(failed) > 0:
        print(failed.keys())
    else:
        print("Sent")
    server.quit()


# First we must check for command line arguments
if len(sys.argv) > 1:
    if sys.argv[1] == "-h":
        print("""Usage:
pctophone -h (This help menu)
pctophone [string to be sent]
pctophone (No arguments: Will take contents of clipboard)""")
    else:
        send_msg(" ".join(sys.argv[1:]))
else:
    send_msg(clip.paste())

To use for self, change my-personal-email@gmail.com to your email address and my-phone-number@vtext.com to your number @ your service provider's sms gateway (for me, Verizon). Here is a list of sms gateways through providers: gateways.

Make sure when you login to your email, you pass it your password, or if you are using gmail. You should generate an 'App password' and also use your email provider's smtp url for the .SMTP() call.

Updated today for best implementation by using port 587 for mail requests and submissions.
Verizon (and other large ISPS) have activity blocked on default ports.