Develop Reference

550 permanent failure when sending email to SMS number with smtplib

When using the smtplib library to send emails to phone numbers (ex. number#tmomail.net), my email gets blocked with the message 550 permanent failure for one or more recipients.
I can successfully send emails using the smtplib library to normal emails. I have used my script to send emails to my personal email.
I can also send emails to the phone number successfully using the manual gmail client. If I log into google manually, fill out the form, the email sends to the number perfectly fine.
with smtplib.SMTP('smtp.gmail.com', 587) as smtp:
smtp.ehlo()
smtp.starttls()
smtp.ehlo()
smtp.login(self.email, self.password)
subject = 'test'
body = 'hello world'
msg = f'Subject: {subject}\n\n{body}'
smtp.sendmail(self.email, validNumber#carrier.com, msg)
Can someone tell me how to make the text go through unblocked the same way it does when it emails normal gmails?

I believe this issue is specific to T-Mobile numbers. Refer to the answer here:
https://support.t-mobile.com/thread/116618
"T-Mobile is now blocking traffic where the sending Domain is altered from the true sending address: IE support#customerservice.com, when the domain is actually is support#gmail.com. senders will receive a 550 bounceback error . To correct this issue, Senders will need to revert their sending address to their actual email address."

Sendgrid not sending email

I am using flask python to send emails using sendgrid, i followed the doc, where i install pip install sendgrid and did the following, but the email is not sent and responds with a status code of 202, is there something i am missing
import sendgrid
from sendgrid.helpers.mail import Email, Content, Mail
def sendEmail():
try:
sg = sendgrid.SendGridAPIClient(apikey="hiddedAPIKey")
from_email = Email("test#example.com")
to_email = Email("myemail#gmail.com")
subject = "Sending with SendGrid is Fun"
content = Content("text/plain", "and easy to do anywhere, even with Python")
mail = Mail(from_email, subject, to_email, content)
response = sg.client.mail.send.post(request_body=mail.get())
print(response.status_code)
print(response.body)
except:
print("the was an error")

Your emails must be going to spam. There are two ways to tackle this situation
You can go into the spam folder and click on the from email address as the trusted email address. (Won't help for multiple sender addresses)
Check the sendgrid official documentation to avoid emails to land into spam.

How do I log into Google through python requests?

I'm making an API using Python requests, and HTTP GET is working fine, but I'm having a little bit of trouble with HTTP POST. So, as with a lot of websites, you can read information, but in order to make a post request (such as following a user, or writing a post), you need to have an authenticated session. THIS website, uses google to log in. Normally, I would just pass the username:password into the POST request formdata to log in, but this google thing is pretty wonky (and quite frankly I'm not that experienced). Does anyone have a reference or an example to help me out? ;/

I do not know about python requests but to send an email its as easy as this
import yagmail
yagmail.SMTP(emailh).send(email, subject, body)
#emailh = your email (just username no #gmail.com)
#email = send to (full email including domain ***#gmail.com or ***#outlook.com)
#subject = subject of the message
#body = body of the message
Even better
emailh = raw_input('Your email: ')
email = raw_input('Send to: ')
subject = raw_input('Subject: ')
body = raw_input('Body: ')
yagmail.SMTP(emailh).send(email, subject, body)
print('Email Sent.')
If this is what you are talking about anyway.
This page might be useful link

sending emails in python weird behaviour

I am working on a piece of code that regularly sends emails from 4 different accounts, 2 of them are gmail accounts and the other 2 are yahoo accounts. When I started writing the code I was able to send all the emails from both the gmail accounts using the following piece of code:
def sendGmail(self, fromaddr, toaddr, username, password,
email_body, email_subject
):
# Build the email
msg = MIMEText(email_body)
msg['Subject'] = email_subject
msg['From'] = fromaddr
msg['To'] = toaddr
try:
# The actual mail send
server = smtplib.SMTP('smtp.gmail.com:587')
server.starttls()
server.login(username,password)
server.sendmail(fromaddr, toaddr, msg.as_string())
server.quit()
print "email sent: %s" % fromaddr
except Exception as e:
print "Something went wrong when sending the email %s" % fromaddr
print e
As I said, this piece of code worked perfectly, now that I add the sendYahoomail(), which is a different method, I always get (530, 'Access denied') as an exception for using sendGmail(). I'm pretty sure it's got nothing to do with my Yahoo method, and I can login from the browser with the gmail credentials correctly.
What can possibly be wrong, or just Gmail doesn't want me to send through code ?

I tried your code above with my Gmail account (actually it's a Google Apps account, but that should be identical) and it works fine for me. I even tried an incorrect "From" header and also using the incorrect source address at the SMTP level - both times Gmail allowed me to send the email, but seemed to quietly fix up the header on egress. Still, you might like to double-check your from address matches your username. Also try using the full email address as the username if you're currently just using the part before the #.
I also tried an incorrect password and received error 535, which isn't the same as what you're seeing. Since I have 2-factor authentication enabled I also tried my real password instead of an application-specific one and that still gave a 535 error (but with the message "application-specific password required").
Is it possible that your ISP has set up something that's intercepting SMTP connections to Gmail? Seems unlikely, although my ISP once blocked access to Gmail on port 587 although port 465 still worked. Perhaps you could try using smtplib.SMTP_SSL on port 465 just in case and see if that gives you any more joy.
You could also try sending to addresses at different providers in case Gmail is rejecting the send for that reason (e.g. if the other provider has been got on to a spam blacklist, for example). Also, if it's possible your email looks like spam, try you code with a message subject and body that's close to an authentic email and see if that helps.

You might find this helpful: https://support.google.com/mail/answer/14257
Basically, Google has detected an attempt to sign in from a server that it considers unfamiliar, and has blocked it. The link above lets you attempt to unblock it.
Sometimes it has worked for me, and sometimes not.

Gmail SMTP + XOAuth mystery

I am using python smtplib and xoauth and I am trying to send an email.
I am using the code posted by Google: http://code.google.com/p/google-mail-xoauth-tools/source/browse/trunk/python/xoauth.py
I am actually authenticating against Gmail and i get this reply
reply: '235 2.7.0 Accepted\r\n'
after sending my XOAuth string as expected (http://code.google.com/apis/gmail/oauth/protocol.html#smtp)
When I compose an email I try to send I get the following error
reply: '530-5.5.1 Authentication Required. Learn more at
reply: '530 5.5.1 http://mail.google.com/support/bin/answer.py?answer=14257 f10sm4144741bkl.17\r\n'
Any clue?

The problem is on how you do the SMTP connection here is a snippet from my code:
smtp_conn = smtplib.SMTP('smtp.googlemail.com', 587)
#smtp_conn.set_debuglevel(True)
smtp_conn.ehlo()
smtp_conn.starttls()
smtp_conn.ehlo()
smtp_conn.docmd('AUTH', 'XOAUTH ' + base64.b64encode(xoauth_string))
You create the xoauth_string as in the example from Google. After that you can use smtp_conn to send your email. If you have any problems let me know. You can find some sample code at https://github.com/PanosJee/xoauth