I had this working before, without an issue, however ever since I put a filter in to remove all threads with more than 1 email it is now coming up with the not a function error. I remove the filter and it still comes up with the error, unsure what has caused this to completely break on me
function extractEmails() {
var htmlBody = getEmailHtml();
var labelName = "auto-reply-incoming";
// get all email threads that match label
var receivedSearchQuery = "label:"+labelName+" -is:sent";
var threads = GmailApp.search(receivedSearchQuery, 0, 500);
threads.forEach ((t, i) => {
let messages = t.getMessages();
let name = messages.getFrom();
let messageCount = t.getMessageCount();
if (messageCount > 1) {
label.removeFromThread(t);
}
if (messageCount <= 1) {
message.reply("Hi " +name+" \n" + "insert text here");
}
});
};
accidentally removed part of the script, fixed with the following code:
messages.forEach ((m, j) => {
let name = m.getFrom();
m.reply("Hi " +name+" \n" + "insert text here");
});
Replace
let name = messages.getFrom();
by
let name = messages[0].getFrom();
The above because getFrom() is method from Class GmailMessage but messages is an Array.
Reference