Why are my emails sent via API failing?
There are several reasons for your email sending via API to fail. Below are some of the failure reasons:
- Any of the mandatory Fields - "subject", "from", "to", "cc", "bcc", "reply_to" was set as Empty Value or Invalid Value.
- If you have used an Invalid JSON.
- Sender address domain is not verified (SPF and DKIM) in your Mail Agent.
- Your ZeptoMail account is yet to be reviewed by us.
- Sendmail token is invalid.
- Total number of attachments exceeding the limit (<=60 attachments).
- Invalid File Cache Key.
- Fields exceeding limits:
reply_to < = 40
to < = 340
cc < = 100
bcc < = 100 - Character limit (<=250) exceeded for the name field for any of these parameters - from, to, reply_to, cc, bcc.
- Subject field exceeding the character count limit (<=500).
- Exceeding the character limit in attachment filename (<=150).
- Attachment size exceeding the limit (<=15 MB).
Refer to our help guide here that lists the error codes and solution for each error.
If you are still facing difficulty in troubleshooting, write to support@zeptomail.com with a screenshot of the error.
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