Get Zoho Mail API working (including DRE Connector, Oauth Token, ZUID, ZOID & ACCOUNT_ID)

Get Zoho Mail API working (including DRE Connector, Oauth Token, ZUID, ZOID & ACCOUNT_ID)

Disclaimer: I’m not a professional coder!



Do you need to use Zoho Mail API?


Me too. It lets you do all sorts of things — like reading the complete header of an email, or forwarding an email with its attachments — which is what I wanted to do.


But setting up the API (application programming interface) took me hours.


It didn’t need to, but advice on this forum sent me in circles and, while the Knowledgebase probably has all the information, it’s not easy to determine which are the relevant bits. So…


Maybe this little guide will help you.

       To use Zoho Mail API you need:

a) A working OAuth Token (Open Authorization token)

b) Up to three Zoho IDs — User, Organization, Account

c) Depending on what you want to do, additional IDs for emails, folders, etc


OAUTH TOKEN


The token validates you when you make an API call. There are various ways to create it.

The hard way: it’s possible to create an OAuth token via Developer Space but this requires lots of options to be chosen and the OAuth token needs to be frequently refreshed. This route is intended for developers who are using external apps to link with Zoho.


The easy way, at least for me, was via a custom function in filters — because it’s simple to do, refreshing the OAuth token is handled by Zoho, and creating a custom function is what I was trying to do anyway


If you already have an OAuth token, great. If not, but have already created a custom function, jump to 4 below. Alternatively:


      1)    In Zoho Mail, go to settings/filters

      2)    Create a new filter and, under Actions, select ‘Custom Function’. Zoho help file here.

      3)    Click ‘Select Function’ and create a new function or use an existing one

      4)    Once the custom function is on screen, select ‘DRE Connectors’ (Deluge Runtime Environment) at the top right

      5)    Click ‘Create Connection’ and under ‘Default Services’ choose ‘Zoho OAuth’

      6)    ‘Connection Name’ can be anything you like. It’s the ‘Connection Link Name’ that you will use in your Deluge scripts.

      7)    Chose the ‘Scopes’ of your token. There are zillions of them and they determine what your script can and can’t do. The most basic might be ‘ZohoMail.messages.READ’. The API Guide Index lists every API command and, for each, details what scope you need (e.g. the send an email page shows you’ll need the scope  ZohoMail.messages.ALL or ZohoMail.messages.CREATE). It's good security practice to only use the minimum scope you need.

      8)    After you click ‘Create and Connect’ you should have a working OAuth token with a lowercase ‘link name’ that you can paste into your Deluge scripts.


NB: The OAuth token only applies to the Zoho area where you have your account (Zoho.eu in my case). So, for example, if I cut and paste a snippet into my script from the send an email page: https://mail.zoho.com/api/accounts/{accountId}/messages it will NOT work with my Europe OAuth token. I would need to change the snippet to: https://mail.zoho.eu/api/accounts/{accountId}/messages


GETTING YOUR IDS


Without API

You’ll see from the snippet above that this particular API needs your ‘accountId’ to work. Zoho advises getting your IDs via an API call, but you don't need to:


1)   Zoho User ID (ZUID).  Just log into Zoho and click the ‘My Profile’ icon (top right). Your user ID is right there under your name and email address.

2)  Zoho Organisation ID (ZOID). Open your Zoho Mail Dashboard (remember, this link is for zoho.eu, you’ll need to use your area). Then select ‘Organization’ on the left menu bar to display ‘Organization Info’, including your Zoho Organization ID.

3) Zoho Account ID (ZAID). Select any of your emails in Zoho Mail. Right click and pick 'Open in New Window'. Your Zoho Accound ID is the number following "accId=". (See Zoho's help page to get the message ID of emails — it also shows the accountId.)

With API
Alternatively, you can get all three IDs with one API call: https://mail.zoho.eu/api/accounts (remember to adjust for your area). Help page here for what scope you need for this API call. The call returns a mass of information but buried in it are your Zoho User ID (ZUID), Zoho Organisation ID (ZOID) and Zoho Account ID (ZAID).


So how do I make the API call?

There are various ways but I use a bit of deluge script:

apiUrl = "https://mail.zoho.eu/api/accounts";
response = invokeurl
[
    url :apiUrl
    type :GET
    connection:"your_oauth_token" // the OAuth token you created, in quotes
];
info response;

1) Create a new Zoho Mail custom function and paste in the above script.
2 ) In the function window, click 'Test Run' (top right). You'll be asked for a Message ID.
3) For this script, any message will do. Select any message in your Zoho Mail inbox. Right click and choose 'Open in New Window'. You'll see the Message ID after 'msgId=' in the URL displayed by your browser. See here for visual.
4) Paste the Message ID into the function window and press 'Proceed'. You'll be presented with the heading 'Console' and the result of your API call beneath it, where you'll find the IDs you need after 'zuid=', 'zoid=' and 'accountId='.

FOLDER & EMAIL IDs


      1)    You may be able to use the name of a folder (e.g. “Trash”) in your Deluge script but if you need the folder ID number, either use this API or, even easier, select an email in the folder your interested in, right click and pick 'Open in New Window'. The folder ID comes after 'folId=' in the browser URL.

      2)    All my scripts are triggered by an email by arriving in my inbox. The ID for that current email is held in the variable ‘mail_messageId’.

      3)    For everything else refer to the API Guide Index


Finally, there might be a better way to do any of the above — I did warn you I’m not a pro! — please feel free to add improvements.

    • Sticky Posts

    • Pocket from Mozilla is closing shop. Don’t lose your favorites . Move them to Zoho Mail Bookmarks now! 📥🔖

      The end of Pocket shouldn't mean the end of your important links and content. Easily import them into Zoho Mail's Bookmarks and continue right where you left off. You can bring over your entire Saves, Collections, and tags just the way they are. Bookmarks

    • Zoho Mail POP & IMAP Server Details

      Hello all! We have been receiving a number of requests regarding the errors while configuring or using Zoho Mail account in POP/ IMAP clients. The server details vary based on your account type and the Datacenter in which your account is setup. Ensure

    • Workplace - Zoholics Europe Customer Awards

      Dear Zoho Mail Community! 📣 We're excited to announce that at this year's Zoholics events across Europe, we're holding customer awards for the first time ever! Workplace - Zoholics Europe Customer Awards This is your chance to shout about the amazing

    • Important update on Group Management | Zoho Mail

      Dear Zoho Mail Community, This post is to inform you all of the following updates on the Group Management in Zoho Mail. Group Member Addition: If a group member is added to an organization group in a Zoho Application, the member will be automatically

    • Mastering email etiquette and best practices to follow in Zoho Mail

      Hello Zoho Mail Community, We’re thrilled to invite you all to our upcoming webinar: Mastering email etiquette and best practices to follow in Zoho Mail. Join our live webinar for expert etiquette tips to enhance your professionalism and elevate your

    • Recent Topics

    • Change Last Name to not required in Leads

      I would like to upload 500 target companies as leads but I don't yet have contact people for them. Can you enable the option for me to turn this requirement off to need a Second Name? Moderation update (10-Jun-23): As we explore potential solutions for

    • Drag 'n' Drop Fields to a Sub-Form and "Move Field To" Option

      Hi, I would like to be able to move fields from the Main Page to a Sub-Form or from a Sub-Form to either the Main Page or another Sub-Form. Today if you change the design you have to delete and recreate every field, not just move them. Would be nice to

    • Passing Info from Function to Client Script

      Hello, I have recently started making use of client script for buttons, allowing me to give the user information or warnings before they proceed. This is great. However, I have never quite managed to pass back any extra information from the function to

    • Reply to Email for SO/PO

      Hello, We are new to Zoho Books and running into an issue. Our support@ email is our integration user. When our team is sending out PO/SO's we are updating the sender email, but for some reason many of our responses are coming back to our support@ email

    • ZOHO Payroll Canada

      Any plans on the roadmap for Canada?

    • What's New in Zoho Billing | January 2026

      Excited about the latest enhancements in Zoho Billing? Our January updates bring an intelligent AI assistant, smarter subscription management, and improved tax compliance, saving you time and reducing manual work. Dive into the details below to see how

    • Zoho Books Sandbox environment

      Hello. Is there a free sandbox environment for the developers using Zoho Books API? I am working on the Zoho Books add-on and currently not ready to buy a premium service - maybe later when my add-on will start to bring money. Right now I just need a

    • Multi-currency and Products

      One of the main reasons I have gone down the Zoho route is because I need multi-currency support. However, I find that products can only be priced in the home currency, We sell to the US and UK. However, we maintain different price lists for each. There

    • Cliq iOS can't see shared screen

      Hello, I had this morning a video call with a colleague. She is using Cliq Desktop MacOS and wanted to share her screen with me. I'm on iPad. I noticed, while she shared her screen, I could only see her video, but not the shared screen... Does Cliq iOS is able to display shared screen, or is it somewhere else to be found ? Regards

    • ZOHO Writer Folders

      Hi We would love to have ability to create folders on the left hand side. We would then be able create and store our documents within each folder Hope you can provide this feature soon ! dux.centra

    • Canvas templates can now be shared with different CRM organizations

      ----------------------------------------Moderated on 14th February, 2023------------------------------------------- Dear all, This feature is now open for all users in all DCs. To learn more about importing and exporting canvas templates, read our help

    • COQL API in JS Widget only pulling 200 records

      Hello! We've been building a custom homepage widget using the Zoho JS SDK, and it seems that this https://help.zwidgets.com/help/latest/ZOHO.CRM.API.html#.coql only allows 200 records. I thought the limit was 2000 for COQL queries, but am I mistaken?

    • Passing the CRM

      Hi, I am hoping someone can help. I have a zoho form that has a CRM lookup field. I was hoping to send this to my publicly to clients via a text message and the form then attaches the signed form back to the custom module. This work absolutely fine when

    • Paid Support Plans with Automated Billing

      We (like many others, I'm sure) are designing or have paid support plans. Our design involves a given number of support hours in each plan. Here are my questions: 1) Are there any plans to add time-based plans in the Zoho Desk Support Plans feature? The

    • How can Data Enrichment be automatically triggered when a new Lead is created in Zoho CRM?

      Hi, I have a pipeline where a Lead is created automatically through the Zoho API and I've been trying to look for a way to automatically apply Data Enrichment on this created lead. 1) I did not find any way to do this through the Zoho API; it seems like

    • Merge Fields that previously worked are now giving an Error!

      Saving a URL Link button on the Deal module. The below fields used to save without issue at all, but now produce an error of "URL contains unsupported merge field!" ${Contacts.Mailing Street} ${Contacts.Mailing City} ${Contacts.Mailing State} ${Contacts.Mailing

    • Do buttons and vba msgbox work on mobile, specifially the iPhone zoho sheets app?

      In Zoho sheets on the web, I inserted a button and assigned a VBA macro to it. It pops up a msgbox with some text. When I go onto the iPhone mobile zoho sheets app, the button is there. When I click on that button, the spinning asterisk appears for a

    • Different form submission results for submitter and internal users

      I'm looking for suggestions on how to show an external submitter a few results while sending internal users all the results from the answers provided by the external user. The final page of our form has a section with detailed results and a section with

    • Column letter from number

      Hello, I am trying to select a cell and i have the column number. How do i do this or is there a way of getting the letter from the number? Thank you

    • Help Desk Services Solution

      I am here looking for Help Desk services solution for organization. I also searched this on many different website and found many solutions. We are bit confused to which one to choose. One of my friend suggest me this platform, and i am hoping i will

    • Facing Issues with Sites Mobile font sizes

      my page renediaz.com is facing issues mobile view, when i try to lower font sizes in home page, instead of changing the size, it changes the line space

    • Remove 'This is an automated mail from Zoho Sign' in footer

      Hi there, Is it possible to remove or change the text under the e-mail templates? I can't figure out how to do that: Would love to hear from you. Kind regards, Tristan

    • Formatting and slow

      Creating campaigns are difficult.  I'm fairly computer literate but some of the way Zoho Campaigns formatting works is painful.  Images fail to upload or are very slow. To top it off, syncing the contacts is a pain as well as temperamental links to create Segments. At this rate I'm afraid we might need to migrate back to Mailchimp.

    • Default Ticket View - Table?

      Guys, We mostly use the table view to queue tickets. Maybe I am missing it - but how can I set that view as 'default" for all our agents? Thanks JV

    • Boost your Zoho Desk's performance by archiving tickets!

      The longer your help desk operations are, the more likely it is to accumulate tickets that are no longer relevant. For example, ticket records from a year ago are typically less relevant than currently open tickets. Such old tickets may eventually lead

    • Paste emails to create segment

      We are moving over from Mailchimp to ZOHO. However Mailchimp allows me to create a segment by pasting in emails from excel (or importing a .csv) can I do the same in Mailchimp?

    • Getting the Record ID of a form once it is submitted - so that form can be edited later

      In Zoho Forms, where can I access the record ID of a form once the form is submitted? - Record ID is not available in webhook payloads - It is not available to form fields, including in formulas - It is not available as a parameter in a thankyou page

    • Auto-Generate Line Numbers in Item Table Using HTML & CSS Counters (Zoho Books & Zoho Inventory Custom Templates)

      <div> <style> /* Start counter from 0 inside tbody */ tbody#lineitem { counter-reset: rowNumber; } /* Increment counter for each row */ tbody#lineitem tr { counter-increment: rowNumber; } /* Show counter value in first column */ tbody#lineitem tr td:first-child::before

    • Possible to define default font and size in Zoho Campaigns?

      Is it possible to define a default font (font, size and colour) for the text, H1 and H2 in Zoho Campaigns? For example: In a campaign, I add a text block, and the text is automatically century gothic, size 11, grey (6f6f6e) by default? Thank you!

    • Zoho Sites - General Feedback

      Hi Everyone-- Quick question for discussion: is it me or is working with Zoho Sites like entering the Twilight Zone? I've built many sites over the years, but this platform seems impossible. I've spent an entire day and a half trying to get a simple one-color

    • File Upload field not showing in workflow

      Hi, I have added a field on Zoho CRM. I want to use it in a workflow where that particular field is updated based on another field, however it is not showing up in the field list to select it in the workflow. Why is this please?

    • You cannot send this email campaign as it doesn't have any eligible contacts in the selected mailing list. You can try adding contacts or choose other mailing lists.

      please help

    • Strengthening the capabilities of CommandCenter in Zoho CRM Plus

      When you look at the prospect-to-customer journey in most businesses 10 to 15 years ago, it was relatively straightforward. Many of us remember walking into a store, sharing our requirements with a sales associate, reviewing a few options, and making

    • World date & time format

      Hello, Is there a timeline to get the worldwide used date and time format ? I mean not the american one... I mean day month year, and 24 hours clock. Regards

    • Announcing Kiosk 1.1 - Customize screen titles, configure new fields & actions, use values from your Kiosk to update fields, and more.

      Hello all We are back again with more enhancements to Kiosk. So what's new? Enhancements made to the Components Add titles for your Kiosk screens and adjust its width to suit your viewing preferences. Three new fields can be added to your screen: Percentage,

    • Any recommendations for Australian Telephony Integration providers?

      HI,  I am looking for some advice on phone providers as we are looking to upgrade our phone system, does anybody have experience with any of the Australian providers that integrate with CRM Telephony? So far we are looking at RingCentral and Amazon Connect, and would love to hear feedback on any of the other providers you might have tried.  Thank you

    • CRM Cadences recognise auto-responses

      I have leads in a Cadence. I get an auto-responder reply "I'm out of the office..." Normally Cadences seems to know that isn't a real reply and keeps the lead enrolled in the cadence. However, today, Cadences has UNENROLLED a Lead who sent an auto-reponse

    • Zoho Campaigns Workspaces

      Hi, I’m currently working on a Zoho CRM + Zoho Campaigns setup for a franchisee-based organization, where each franchise must only see and use its own contacts. At the moment, franchisees cannot properly access their contact lists in Zoho Campaigns unless

    • Limited System because of Limited Number of Fields for Car Dealership

      Dear Zoho Support, we want to have all the information about a car inside of a car record. We want to have Zoho CRM as our single source of truth for our data, but the limited number of fields are not allowing that. The data consist of: technical data

    • Automatically Update Form Attachment Service with Newly added Fields

      Hi, When I have a Form Setup and connected to a 3rd Party Service such as OneDrive for Form Attachments, when I later add a new Upload Field I have to remove and redo the entire 3rd Party Setup from scratch. This needs to be improved, such as when new

    • Next Page