oauth2 on office365 smtp with curl error 530 5.7.57 Client not authenticated to send mail

golemwashere

7/10/23, 9:18 PM

I am using this curl:

curl -vvv --url 'smtp://smtp.office365.com:587' \
--ssl-reqd \
--mail-from "$user" \
--mail-rcpt "$destuser" \
--upload-file ./mail.txt \
--oauth2-bearer $accesstoken

to try to send an email from an account where I registered an oauth application with these Graph Permission - Delegated Permissions

SMTP.Send
Mail.Read
Mail.Send
openid
offline_access

but I always get error: 530 5.7.57 Client not authenticated to send mail.

both the user mailbox and the transport have SmtpClientAuthenticationDisabled to $false

I am quite confident that the access token is valid, I also tested the refresh token which works, any idea on how to make this work?

Is curl compatible with https://docs.microsoft.com/en-us/exchange/client-developer/legacy-protocols/how-to-authenticate-an-imap-pop-smtp-application-by-using-oauth

0 + 0

curl

oauth

microsoft-office-365

golemwashere

7/13/23, 10:21 AM

managed to authenitcate manually with: XOAUTH2="user=$user\001auth=Bearer $token\001\001" echo -en $XOAUTH2 | base64 > encodedtoken.txt tr -d '\n' < encodedtoken.txt > encnonewline.txt helo="myserver.com" from='[email protected]' to='[email protected]' subj="subject: test mail" data=" hello test mail" encoded2=$( cat encnonewline.txt )

golemwashere

7/13/23, 10:21 AM

{ sleep 1 echo "helo $helo" sleep 0.5 echo "auth xoauth2" sleep 1 echo $encoded2 sleep 3 echo "mail from:<$from>" sleep 0.5 echo "rcpt to:<$to>" echo "data" echo "From: $from" echo "To: $to" echo "$subj" echo echo "$data" echo "." sleep 1 echo quit } | timeout 15 openssl s_client -connect smtp.office365.com:587 -crlf -starttls smtp > ./output.txt 2>&1 cat ./output.txt still need to understand how to do with curl

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: oauth2 on office365 smtp with curl error 530 5.7.57 Client not authenticated to send mail

TH: oauth2 บน office365 smtp พร้อมข้อผิดพลาด curl 530 5.7.57 ไคลเอนต์ไม่รับรองความถูกต้องเพื่อส่งเมล

RO: oauth2 pe office365 smtp cu eroare curl 530 5.7.57 Clientul nu a fost autentificat pentru a trimite e-mail

RU: oauth2 на smtp office365 с ошибкой curl 530 5.7.57 Клиент не аутентифицирован для отправки почты

VI: oauth2 trên office365 smtp với lỗi curl 530 5.7.57 Máy khách không được xác thực để gửi thư

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