Sending Emails
Can I use a custom template for my emails?
Yes. You can use any custom template in Zoho CPaaS by creating a new template and pasting your HTML content into it. Save the new template for future reference. You can then use the template key generated for the new template in your API requests.
How can I tackle email bounces?
Bounces are emails that are returned to the sender without being delivered to the recipient. There are two types of email bounces: soft and hard. Soft bounces — Caused by temporary issues like network problems, full mailboxes or temporary server ...
Can I view my emails' contents?
Yes, you can opt to view your emails' contents in Zoho CPaaS. By default, Zoho CPaaS stores 60 days' worth of email logs, and if you wish to view their content too, you can enable them in: Settings >> Content settings >> Save email content checkbox
What is the difference between template key and template alias?
Template key: The template key is a unique identifier assigned to each template created in Zoho CPaaS. It is available next to the templates in the Templates section within an Agent. This key can be passed as a parameter in the API request body to ...
How can I display my company's logo next to my emails?
You can display your logo using a standard called Brand Indicators for Message Identification or BIMI. To register your brand with BIMI, you should: Set up DMARC authentication and have "p/sp=reject or p/sp=quarantine at pct=100". Obtain a Verified ...
Can I secure my webhooks?
Yes, you can secure your webhooks using an authentication key. This key will be sent along with the data delivered to the assigned POST URL. The page given here explains the steps to authenticate the webhook data
Where can I view bounced emails?
You cannot view the actual content of the emails that have bounced. However, you can view detailed bounce statistics in your Zoho CPaaS account. Within the account, you can view the type of bounce, date and time of the bounce, Agent, and domain-wise ...
Should the 'from' address and 'reply-to' address have a mailbox?
No, the 'from' and 'reply-to' addresses need not have a mailbox, since transactional emails are a one-way communication system. However, if you expect a reply from your customers, you can create a mailbox for the domain you use to send emails from. ...
What are the list of attachment formats supported by Zoho CPaaS?
Zoho CPaaS does not support the following attachments as extensions: ade, adp, bat, chm, cmd, com, cpl, exe, hta, ins, isp, js, jse, lib, lnk, mde, msc, msp, mst, pif, scr, sct, shb, sys, vb, vbe, vbs, vxd, wsc, wsf, wsh, app, asp, bas, cer, cnt, ...
Why are my emails sent via API failing?
There are several reasons for email-sending failures. The prominent ones are listed below: One or more mandatory fields - "subject", "from", "to", "cc", "bcc", "reply_to" were set as an Empty Value or Invalid Value. The email-sending domain is ...
Why are emails sent via SMTP failing?
There are several reasons email-sending failures using SMTP. They are: Trying to connect with the SMTP server from an insecure source. Misaligned port and certification. (TLS—>587; SSL—>465) Invalid TLS certificate version. Zoho CPaaS supports TLS ...
Why is the contact image for my emails displayed as a question mark on Gmail client?
When you configure your domains with Zoho CPaaS, it is mandatory to complete the DKIM authentication. Sometimes the DKIM records added for your DNS can be altered or removed due to several reasons. For example, when you transfer your domains to a new ...
How to configure API?
You need to add the send mail token to authenticate your API requests. This is a unique token you can generate in your Agent within your Zoho CPaaS account. Use the send mail token as a header when you call Zoho CPaaS REST Email Sending API. Example ...
How to configure SMTP?
SMTP Configuration settings for Zoho CPaaS Server name - smtp.zeptomail.com Port Number, Authentication - 465 (SSL), 587 (TLS) Username - emailapikey (we also support applications that use the From address as the username) Authorization - Password. ...
Why was my account blocked?
Zoho CPaaS is a dedicated platform for sending transactional emails, such as OTPs, password resets, and onboarding emails. This means we do not support bulk, promotional or marketing emails. Transactional and promotional emails follow different ...
Why am I unable to get DKIM verified?
DNS propagation can take about 24-48 hours, and we recommend that you wait for that time period. In the meantime, you can: Check the propagation status using this tool. Verify if the DKIM record is copied correctly without any spaces or missing ...
Why is my Zoho CPaaS account still not reviewed?
We generally take 2 business days to review your account. Sometimes we need additional information from you that will help us verify your business identity and understand the nature of emails you are planning to send. In such cases our presales team ...