Getting exception using IMAP login on gmail using .net

Question

An unhandled exception of type 'Limilabs.Client.IMAP.ImapResponseException' occurred in Mail.dll

Additional information: [ALERT] Please log in via your web browser: https://support.google.com/mail/accounts/answer/78754 (Failure)

 using (Imap imap = new Imap())
        {
            //Pass Host Name as string for connection
            imap.ConnectSSL("imap.gmail.com");

            //Pass Credential for Gmail account for Login Use Login() Method
            imap.UseBestLogin("abc@gmail.com", "XXXXXX");

            //Select Folder as of Now i am selecting Inbox Folder
            FolderStatus _folderStatus = imap.SelectInbox();

            //Find all Unseen Message Set to Flag Property
            List<long> uids =  imap.SearchFlag(Flag.Unseen);
            foreach (long uid in uids)
            {
                //Download Message Based On UID
                byte[] eml = imap.GetMessageByUID(uid);
                //Parse Download MEssage
                IMail imail = new MailBuilder().CreateFromEml(eml);
                Console.WriteLine(imail.Subject);
                Console.WriteLine(imail.TextDataString);
            }
            imap.Close();

Answer 1

First log in to the specified account via the web browser, you might have received an email with the blocked attempt information. Review it - you might need to confirm it was you.

There are several ways of dealing with this error:

• Enable "Access for less secure apps" at: https://www.google.com/settings/security/lesssecureapps
  (use incognito mode so you are sure you are logged in to correct account)

Please note that contrary to what the label says those applications (such as Thunderbird, Outlook and Mail.dll) are secure – they use TLS or SSL to secure the communication. The label name Gmail uses is misleading and false.

• Use OAuth 2.0 (OAuth 2.0 for installed applications, OAuth 2.0 for web applications, OAuth 2.0 for service accounts)

• Use application specific passwords (You can find how to create one in the Gmail support site)

• In some cases you'll need to use unlock captcha (use incognito mode so you are sure you are logged in to correct account): https://accounts.google.com/DisplayUnlockCaptcha

Here are more information on how to enable IMAP in Gmail.
https://www.limilabs.com/blog/enable-imap-in-gmail

Comments

Yes I got mail as you told . And I set less Secure . but after that i am again getting this error

---

Use incognito mode for both captcha reset and less secure apps setting, so you are sure you are logged in to correct account