python 3.x - SMTP b'535 5.7.3 Authentication unsuccessful

Question

i am trying to send a email using smtplib but getting error "b'535 5.7.3 Authentication unsuccessful". meanwhile my user and password is correct. am able to send message from my personal mail. After ready related post i found there could be SMTP Authentication issue at company server. At company server end SMTP Authentication is enable. Please guide me how to overcome from this error. Below is my code and error log.

import smtplib
server=smtplib.SMTP('smtp-mail.outlook.com',587)
server.ehlo()
server.starttls()
server.set_debuglevel(1)
server.login('user','password')
server.ehlo()

below error log.

send: 'ehlo company.com
'
reply: b'250-PN2PR01CA0167.outlook.office365.com Hello [2409:4052:2e20:7e24:1102:e6fc:fbb1:6b56]
'
reply: b'250-SIZE 157286400
'
reply: b'250-PIPELINING
'
reply: b'250-DSN
'
reply: b'250-ENHANCEDSTATUSCODES
'
reply: b'250-AUTH LOGIN XOAUTH2
'
reply: b'250-8BITMIME
'
reply: b'250-BINARYMIME
'
reply: b'250-CHUNKING
'
reply: b'250 SMTPUTF8
'
reply: retcode (250); Msg: *company*.outlook.office365.com Hello [2409:4052:2e20:7e24:1102:e6fc:fbb1:6b56]
SIZE 157286400
PIPELINING
DSN
ENHANCEDSTATUSCODES
AUTH LOGIN XOAUTH2
8BITMIME
BINARYMIME
CHUNKING
SMTPUTF8'
send: 'AUTH LOGIN bWFrdW1hckBpbmZpbmVyYS5jb20=
'
reply: b'334 ******
'
reply: retcode (334); Msg:********'
send: 'RGVsaGkjJDU2Nw==
'
reply: b'535 5.7.3 Authentication unsuccessful [PN2PR01CA0167.INDPRD01.PROD.OUTLOOK.COM]
'
reply: retcode (535); Msg: b'5.7.3 Authentication unsuccessful [PN2PR01CA0167.INDPRD01.PROD.OUTLOOK.COM]'

question from:https://stackoverflow.com/questions/65949753/smtp-b535-5-7-3-authentication-unsuccessful

Answer 1

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