Run script if cell change in Google Sheets - google-sheets

Question

I have this code, it works if i run it from Script Editor, but doesnt run when i change the cell to "Send Melding". The script runs until it comes to MailApp.sendEmail, then it stops..
Heres the code :
function onEdit(e) {
var s = SpreadsheetApp.getActiveSheet(), r, colCell;
if(s.getName() === 'SkapOversikt') { //checks that we're on the correct sheet
r = s.getActiveCell();
colCell = r.getColumn();
if(colCell === 1 || colCell === 6) { //checks the column
nextCell = r.offset(0, 0);
if(nextCell.getValue() === 'Send Melding') { //Inneholder "Send Melding", kjør script
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = ss.getActiveSheet();
var cell = ss.getActiveCell().getA1Notation();
var row = sheet.getActiveRange().getRow();
var cellvalue = ss.getActiveCell().getValue().toString();
var recipients = sheet.getRange(7, 7).getValue();
var subject = 'Skapoversikt har blitt oppdatert på : '+sheet.getRange(4, 2).getValue();
var body = 'Blåse info på ' + sheet.getRange(4, 2).getValue() + ' har blitt oppdatert. ' + '\n' + '\nFølg link for å se endringer : ' + ss.getUrl() + '\n' + '\n' + 'Melding fra melder : ' + '\n' + '" ' + sheet.getRange(6, 7).getValue() + ' " ' + '\n ' + '\n (Dette er en generert mail fra Google Sheets og vil ikke kunne besvares) ' + '\n' + '\n - AK AS ';
MailApp.sendEmail(recipients, subject, body);
var sheet = SpreadsheetApp.getActive().getSheetByName('SkapOversikt');
sheet.getRange('G6').setValue('Ingen Melding');
sheet.getRange('A6').setValue('Velg');
Browser.msgBox('Takk for det - Meldingen er sendt!' , 'Meldingen er sendt til : '+sheet.getRange(7, 7).getValue()+ '\n' + ' - (Fra epost : )', Browser.Buttons.OK);
}
}
}
}

Answer 1

I don't think you can send emails on a simple onEdit trigger. Try changing the name of your function (e.g: sendMails(e) ) and add an installable trigger by going into Resources > add a trigger > sendMails > from spreadsheet > on Edit.
See if it then works ?