好的，我已经为此工作了几天，因为我对 Gmail 在对话中标记/不标记邮件的奇怪方式感到非常沮丧。
实际上，我很惊讶标签不会自动应用于对话中的新消息。这根本没有反映在 Gmail 用户界面中。无法查看线程并确定标签仅适用于线程中的某些消息，并且您无法将标签添加到 UI 中的单个消息。在我处理下面的脚本时，我注意到您甚至无法以编程方式将标签添加到单个消息中。因此，目前的行为确实没有理由。
随着我的咆哮，我有一些关于脚本的注释。
- 我将 Saqib 的代码与 Serge 的代码结合起来。
- 该脚本有两部分：一个重新标记所有附加了用户标签的线程的初始运行，以及一个标记最近电子邮件的维护运行（当前回顾 4 天）。在单次运行期间只执行一个部分。初始运行完成后，将仅运行维护部分。您可以设置一个触发器，使其每天运行一次，或多或少地运行一次，具体取决于您的需要。
- 初始运行在 4 分钟后停止，以避免被 5 分钟的脚本时间限制终止。它将触发器设置为在 4 分钟后再次运行（这两个时间都可以使用脚本中的常量进行更改）。触发器在下次运行时被删除。
- 维护部分没有运行时检查。如果您在过去 4 天内有大量电子邮件，则维护部分可能会达到脚本时间限制。我可能可以在这里更改脚本以提高效率，但到目前为止它对我有用，所以我并没有真正的动力去改进它。
- 初始运行中有一条 try/catch 语句，试图捕捉 Gmail “写入配额错误”并优雅退出（即写入当前进度，以便稍后再次拾取），但我不知道它是否有效，因为我无法让错误发生。
- 当达到时间限制以及初始运行完成时，您会收到一封电子邮件。
- 由于某种原因，日志并不总是在运行之间完全清除，即使使用 Logger.clear() 命令也是如此。因此，它通过电子邮件发送给用户的状态日志不仅仅是最新的运行信息。我不知道为什么会这样。
我用它在大约半小时（包括等待时间）内处理了 20,000 封电子邮件。我实际上运行了两次，所以它在一天内处理了 40,000 封电子邮件。我猜 10,000 的 Gmail 读/写限制不是这里应用的（也许一次将标签应用于 100 个线程算作单个写入事件而不是 100？）。根据它发送的状态电子邮件，它在 4 分钟的运行中通过了大约 5,000 个线程。
很抱歉排长队。我责怪宽屏显示器。让我知道你的想法！
function relabelGmail() {
var startTime= (new Date()).getTime(); // Time at start of script
var BATCH=100; // total number of threads to apply label to at once.
var LOOKBACKDAYS=4; // Days to look back for maintenance section of script. Should be at least 2
var MAX_RUN_TIME=4*60*1000; // Time in ms for max execution. 4 minutes is a good start.
var WAIT_TIME=4*60*1000; // Time in ms to wait before starting the script again.
Logger.clear();
// ScriptProperties.deleteAllProperties(); return; // Uncomment this line and run once to start over completely
if(ScriptProperties.getKeys().length==0){ // this is to create keys on the first run
ScriptProperties.setProperties({'itemsProcessed':0, 'initFinished':false, 'lastrun':'20000101', 'itemsProcessedToday':0,
'currentLabel':'null-label-NOTREAL', 'currentLabelStart':0, 'autoTrig':0, 'autoTrigID':'0'});
}
var itemsP = Number(ScriptProperties.getProperty('itemsProcessed')); // total counter
var initTemp = ScriptProperties.getProperty('initFinished'); // keeps track of when initial run is finished.
var initF = (initTemp.toLowerCase() == 'true'); // Make it boolean
var lastR = ScriptProperties.getProperty('lastrun'); // String of date corresponding to itemsProcessedToday in format yyyymmdd
var itemsPT = Number(ScriptProperties.getProperty('itemsProcessedToday')); // daily counter
var currentL = ScriptProperties.getProperty('currentLabel'); // Label currently being processed
var currentLS = Number(ScriptProperties.getProperty('currentLabelStart')); // Thread number to start on
var autoT = Number(ScriptProperties.getProperty('autoTrig')); // Number to say whether the last run made an automatic trigger
var autoTID = ScriptProperties.getProperty('autoTrigID'); // Unique ID of last written auto trigger
// First thing: google terminates scripts after 5 minutes.
// If 4 minutes have passed, this script will terminate, write some data,
// and create a trigger to re-schedule itself to start again in a few minutes.
// If an auto trigger was created last run, it is deleted here.
if (autoT) {
var allTriggers = ScriptApp.getProjectTriggers();
// Loop over all triggers. If trigger isn't found, then it must have ben deleted.
for(var i=0; i < allTriggers.length; i++) {
if (allTriggers[i].getUniqueId() == autoTID) {
// Found the trigger and now delete it
ScriptApp.deleteTrigger(allTriggers[i]);
break;
}
}
autoT = 0;
autoTID = '0';
}
var today = dateToStr_();
if (today == lastR) { // If new day, reset daily counter
// Don't do anything
} else {
itemsPT = 0;
}
if (!initF) { // Don't do any of this if the initial run has been completed
var labels = GmailApp.getUserLabels();
// Find position of last label attempted
var curLnum=0;
for ( ; curLnum < labels.length; curLnum++) {
if (labels[curLnum].getName() == currentL) {break};
}
if (curLnum == labels.length) { // If label isn't found, start over at the beginning
curLnum = 0;
currentLS = 0;
itemsP=0;
currentL=labels[0].getName();
}
// Now start working through the labels until the quota is hit.
// Use a try/catch to stop execution if your quota has been hit.
// Google can actually automatically email you, but we need to clean up a bit before terminating the script so it can properly pick up again tomorrow.
try {
for (var i = curLnum; i < labels.length; i++) {
currentL = labels[i].getName(); // Next label
Logger.log('label: ' + i + ' ' + currentL);
var threads = labels[i].getThreads(currentLS,BATCH);
for (var j = Math.floor(currentLS/BATCH); threads.length > 0; j++) {
var currTime = (new Date()).getTime();
if (currTime-startTime > MAX_RUN_TIME) {
// Make the auto-trigger
autoT = 1; // So the auto trigger gets deleted next time.
var autoTrigger = ScriptApp.newTrigger('relabelGmail')
.timeBased()
.at(new Date(currTime+WAIT_TIME))
.create();
autoTID = autoTrigger.getUniqueId();
// Now write all the values.
ScriptProperties.setProperties({'itemsProcessed':itemsP, 'initFinished':initF, 'lastrun':today, 'itemsProcessedToday':itemsPT,
'currentLabel':currentL, 'currentLabelStart':currentLS, 'autoTrig':autoT, 'autoTrigID':autoTID});
// Send an email
var emailAddress = Session.getActiveUser().getEmail();
GmailApp.sendEmail(emailAddress, 'Relabel job in progress', 'Your Gmail Relabeller has halted to avoid termination due to excess ' +
'run time. It will run again in ' + WAIT_TIME/1000/60 + ' minutes.\n\n' + itemsP + ' threads have been processed. ' + itemsPT +
' have been processed today.\n\nSee the log below for more information:\n\n' + Logger.getLog());
return;
} else {
// keep on going
var len = threads.length;
Logger.log( j * BATCH + len);
labels[i].addToThreads(threads);
currentLS = currentLS + len;
itemsP = itemsP + len;
itemsPT = itemsPT + len;
threads = labels[i].getThreads( (j+1) * BATCH, BATCH);
}
}
currentLS = 0; // Reset LS counter
}
initF = true; // Initial run is done
} catch (e) { // Clean up and send off a notice.
// Write current values back to ScriptProperties
ScriptProperties.setProperties({'itemsProcessed':itemsP, 'initFinished':initF, 'lastrun':today, 'itemsProcessedToday':itemsPT,
'currentLabel':currentL, 'currentLabelStart':currentLS, 'autoTrig':autoT, 'autoTrigID':autoTID});
var emailAddress = Session.getActiveUser().getEmail();
var errorDate = new Date();
GmailApp.sendEmail(emailAddress, 'Error "' + e.name + '" in Google Apps Script', 'Your Gmail Relabeller has failed in the following stack:\n\n' +
e.stack + '\nThis may be due to reaching your daily Gmail read/write quota. \nThe error message is: ' +
e.message + '\nThe error occurred at the following date and time: ' + errorDate + '\n\nThus far, ' +
itemsP + ' threads have been processed. ' + itemsPT + ' have been processed today. \nSee the log below for more information:' +
'\n\n' + Logger.getLog());
return;
}
// Write current values back to ScriptProperties. Send completion email.
ScriptProperties.setProperties({'itemsProcessed':itemsP, 'initFinished':initF, 'lastrun':today, 'itemsProcessedToday':itemsPT,
'currentLabel':currentL, 'currentLabelStart':currentLS, 'autoTrig':autoT, 'autoTrigNumber':autoTID});
var emailAddress = Session.getActiveUser().getEmail();
GmailApp.sendEmail(emailAddress, 'Relabel job completed', 'Your Gmail Relabeller has finished its initial run.\n' +
'If you continue to run the script, it will skip the initial run and instead relabel ' +
'all emails from the previous ' + LOOKBACKDAYS + ' days.\n\n' + itemsP + ' threads were processed. ' + itemsPT +
' were processed today. \nSee the log below for more information:' + '\n\n' + Logger.getLog());
return; // Don't run the maintenance section after initial run finish
} // End initial run section statement
// Below is the 'maintenance' section that will be run when the initial run is finished. It finds all new threads
// (as defined by LOOKBACKDAYS) and applies any existing labels to all messages in each thread. Note that this
// won't miss older threads that are labeled by the user because all messages in a thread get the label
// when the label action is first performed. If another message is then sent or received in that thread,
// then this maintenance section will find it because it will be deemed a "new" thread at that point.
// You may need to search further back the first time you run this if it took more than 3 days to finish
// the initial run. For general maintenance, though, 4 days should be plenty.
// Note that I have not implemented a script-run-time check for this section.
var threads = GmailApp.search('newer_than:' + LOOKBACKDAYS + 'd', 0, BATCH); //
var len = threads.length;
for (var i=0; len > 0; i++) {
for (var t = 0; t < len; t++) {
var labels = threads[t].getLabels();
for (var l = 0; l < labels.length; l++) { // Add each label to the thread
labels[l].addToThread(threads[t]);
}
}
itemsP = itemsP + len;
itemsPT = itemsPT + len;
threads = GmailApp.search('newer_than:' + LOOKBACKDAYS + 'd', (i+1) * BATCH, BATCH);
len = threads.length;
}
// Write the property data
ScriptProperties.setProperties({'itemsProcessed':itemsP, 'initFinished':initF, 'lastrun':today, 'itemsProcessedToday':itemsPT,
'currentLabel':currentL, 'currentLabelStart':currentLS, 'autoTrig':autoT, 'autoTrigID':autoTID});
}
// Takes a date object and turns it into a string of form yyyymmdd
function dateToStr_(dateObj) { //takes in a date object, but uses current date if not a date
if (!(dateObj instanceof Date)) {
dateObj = new Date();
}
var dd = dateObj.getDate();
var mm = dateObj.getMonth()+1; //January is 0!
var yyyy = dateObj.getFullYear();
if(dd<10){dd='0'+dd};
if(mm<10){mm='0'+mm};
dateStr = ''+yyyy+mm+dd;
return dateStr;
}
编辑：2017 年 3 月 24 日我想我应该打开通知或其他东西，因为我从未见过来自 user29020 的问题。如果有人有同样的问题，我会这样做：我通过将每日触发器设置为每晚凌晨 1 点到 2 点之间运行，将其作为维护功能运行。
附加说明：似乎在过去一年左右的某个时候，对 Gmail 的标记调用显着放缓。现在每个线程大约需要 0.2 秒，所以我预计最初运行 20k 封电子邮件至少需要运行 20 次左右才能完成。这也意味着，如果您通常每天收到超过 100-200 封电子邮件，维护部分也可能会开始花费太长时间并开始失败。现在有很多电子邮件，但我敢打赌，有些人会收到这么多，而且看起来你会比我第一次写失败时每天需要 1000 封左右的电子邮件更有可能收到。脚本。
无论如何，一种缓解措施是将 LOOKBACKDAYS 减少到小于 4，但我不建议将其小于 2。