So the bottom code will probably stop working with Gmail. The solution is to enable 2-Step Verification and generate Application password, then you can use the generated password to send emails using nodemailer.To do so you need to do the following:
If you have two-step verification enabled on the account, you will need to use an application specific password (created in the Gmail account) in the device settings: Signing in using application-specific passwords
How to fix error: Username and Password not accepted, using any mail script or application
If there is still a problem, try clearing Captcha: visit and sign in with the Gmail username and password. If necessary (it's usually not), enter the letters in the distorted picture then press Continue. This will allow ten minutes for the device to register as an approved connection. Note that you must use the account you are trying to add to the device - if the browser is already signed into another account, you must sign out first. Also, you must trigger the device to make a connection within ten minutes of pressing Continue.
I had same issue. And I fix it with creating an app-password for Email application on Mac.You can find it at my account -> Security -> Signing in to Google -> App passwords.below is the link for it. _source=google-account&utm_medium=web
If you receive this message, it means that there is an account associated with your email address. You may have previously applied with an organization that is a NEOGOV customer. You can retrieve your credentials by following the username and password steps.
Users with Outlook 2016 (retail version), 2019, 2021, and 365 won't have a problem when Less Secure Apps is disabled. They can connect to Gmail accounts (using IMAP) with Allow less secure apps turned off. Gmail users with older versions of Outlook who want to continue to use Outlook will have two options: upgrade to new version of Office or enable two step verification on their account and use an app password.
In my experience with Gmail, their implementation of two-factor authorization is not annoying at all and retains the authorization. It doesn't request re-authorization often, which makes using an app password fairly painless. If you use public hotspots, you should enable two-factor.
In the example, I'm creating a new SmtpClient which is the key class when needing to communicate with SMTP servers. The class accepts the hostname (smtp.gmail.com used as an example but the value will depend on what service you pick) in the constructor. Most SMTP servers expect you to use port 587 through a secure connection that is set up using the Port, Credentials, and EnableSsl properties. You need to replace username with your full username (typically the email) and password with your password. In the last line, I call the Send-method. Replace email with your full email address and recipient with the full email address of the person who should receive the email.
If you are a Google Workspace customer, you can send emails using a username and password. I would recommend generating a new password specific to your C# code to avoid sharing your password with others.
This error is typically shown when either the username or password is wrong. Check both values and make sure to use valid credentials. As already mentioned in the SMTP section, when using Google's SMTP servers, you will need to enable Less secure app access. If this setting isn't enabled, sending emails through their servers requires you to sign in through OAuth2.
When creating a new ASP.NET Core application from the template, there are a couple of built-in email features. One of them being the forgot password feature. With the default code provided, no email is actually sent when clicking this button. You will need to tell ASP.NET Core how to send emails using one of the solutions listed previously in this post.
Host: smtp.gmail.comPort: 587 (or 465 using SSL encryption)Username: Your Gmail account email address ([email protected])Password: You will need to generate an app password in GoogleEncryption: TLS
You need to create an app password so that the ESP32 is able to send emails using your Gmail account. An App Password is a 16-digit passcode that gives a less secure app or device permission to access your Google Account. Learn more about sign-in with app passwords here.
The password directive may be omitted. In that case, if the account in question has auth set to a legitimate value other than off, invoking msmtp from an interactive shell will ask for the password before sending mail. msmtp will not prompt if it has been called by another type of application, such as Mutt. For such cases, the --passwordeval parametercan be used to call an external keyring tool like GnuPG.
It can be clearly seen that if the user doesn't exist, the application will directly throw an error. Otherwise, when the user exists and the password doesn't, it is apparent that there will be more processing before the application errors out. In return, the response time will be different for the same error, allowing the attacker to differentiate between a wrong username and a wrong password.
While authentication through a user/password combination and using multi-factor authentication is considered generally secure, there are use cases where it isn't considered the best option or even safe. Examples of this are third party applications that desire connecting to the web application, either from a mobile device, another website, desktop or other situations. When this happens, it is NOT considered safe to allow the third-party application to store the user/password combo, since then it extends the attack surface into their hands, where it isn't in your control. For this, and other use cases, there are several authentication protocols that can protect you from exposing your users' data to attackers.
Open Authorization (OAuth) is a protocol that allows an application to authenticate against a server as a user, without requiring passwords or any third party server that acts as an identity provider. It uses a token generated by the server and provides how the authorization flows most occur, so that a client, such as a mobile application, can tell the server what user is using the service.
U2F augments password-based authentication using a hardware token (typically USB) that stores cryptographic authentication keys and uses them for signing. The user can use the same token as a second factor for multiple applications. U2F works with web applications. It provides protection against phishing by using the URL of the website to look up the stored authentication key. 2ff7e9595c
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