MailApp AppScript：如何使用 MailApp 将 email 发送到线程？

Question

I am using mailApp class of Appscript to send daily emails as shown below:

MailApp.sendEmail({to: emails[0],subject:subjectLine,htmlBody: htmlContent,cc: emails.slice(1,emails.length).join(",")});

What I observe is that for subjectline = "TestEmail" if sent more than once it gets sent to a new thread:

What I actually want is to instead of MailApp creating a new thread, it must send it to the old thread if the subject line is the same. Like for example: subjectline = "TestEmail" then all the mails within this subject should fall under the same and not dispersed as shown above. And only when the subject line changes they should fall into a new email thread.

Has anyone faced the same problem? Does anyone know any work around for the same? Please let me know if you have a solution for the same.

Thanks in Advance.

Answer 1

Class MailApp

• This service allows scripts to send email on a user's behalf. See also Gmail Service. Unlike Gmail Service, Mail Service's sole purpose is sending email; it cannot access a user's Gmail account.

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Workaround:

You can prevent creating a new thread when sending emails using Gmail Service

Gmail Service

• This Service lets you send email, compose drafts, manage labels, mark messages and threads, and conduct a variety of other Gmail account management tasks.

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What you need to do:

1. Search for a thread with a specific subject
2. Reply to that thread

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Sample Code:

  var thread = GmailApp.search('in:anywhere subject:"Test_Email1" ')[0];
  Logger.log(thread);
  
  var invalidThread = GmailApp.search('in:anywhere subject:"Test_Email" ')[0];
  Logger.log(invalidThread);
  
  if (thread){
    thread.reply("This is a reply");
  }else{
    Logger.log("Subject not found in mail");
  }

  var emailQuotaRemaining = MailApp.getRemainingDailyQuota();
  Logger.log("Remaining email quota: " + emailQuotaRemaining);

GmailApp.search() lets you search for specific queries in Gmail. This will return a GmailThread[] type which is an array of Gmail threads matching this query

• In this sample code, I already created a Thread with Subject:"Test_Email1" and tried to access that thread using the Gmail search operator "in:anywhere subject:"Test_Email1""
• This search operator will search for threads with Test_Email1 subject anywhere in your Gmail, including spam and thrash folder.
• I also included a sample code where the subject "Test_Email" doesn't exist which will return an empty array.
• Once you have found your thread, you can use GmailThread.reply() to reply in your current thread.

There are other reply options available in GmailThread. For more information, you can visit this link: https://developers.google.com/apps-script/reference/gmail/gmail-thread

By this, you may decide whether you need to create a new thread or reply with an existing thread in your Gmail.

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Output: