API Error Codes

Error Code	Sub Code	Reason	Solution
TM_3201	GE_102	Mandatory Field "subject" was set as Empty Value.	Set the Mandatory Fields as proper values instead of setting Empty in the API.
		Mandatory Field "from" is missing.	Add the mandatory "from" field.
		No recipient field found.	Add either "to", "cc" or "bcc" fields.
		Mandatory field "Mail Template Key" is missing.	Add the mandatory "Mail Template Key" field.
TM_3301	SM_101	Invalid JSON.	Kindly check your API syntax.
TM_3301	SM_120	Invalid Mimetype found	Kindly check if the attachment added and the Mimetype specified match.
TM_3501	UE_106	Invalid File Cache Key.	Obtain proper File Cache Key from the respective Mail Agent in your File Cache tab.
	MTR_101	Invalid Template Key.	Obtain proper Template Key from the respective Mail Agent.
	LE_101	Credits expired.	Purchase new credits from the ZeptoMail Subscription page.
TM_3601	SERR_156	Email sending IP is not in the allowed IPs list.	You need to add the relevant IP to the allowed IPs list from the settings. Learn more
	SM_133	Trial mail sending limit exceeded.	Get your account reviewed to start sending emails again.
	SMI_115	Per day limit exhausted, try after some time.	Wait till the next day to send your emails.
	AE_101	Account blocked	Contact ZeptoMail support
TM_4001	SM_111	Sender address domain is not verified in your Mail Agent.	Use the sender address domain that is verified in your Mail Agent.
	SM_113	Mandatory Field "from" has Invalid Value.	Set the Mandatory Fields as proper values in the API. Note: target_value in the error response shows the field where an invalid email address is set. Same error response if an Invalid Values is set in any of these fields: cc, bcc, mime-type in attachments, reply_to, File Cache Key.
		Mandatory Field "to" has Invalid Value.
		Mandatory Field "bounce_address" is missing or has Invalid Value.
	SM_128	Your ZeptoMail account is yet to be reviewed and approved by us.	Get your account reviewed and then send your emails using API.
	SERR_157	Sendmail token is invalid.	Obtain proper Sendmail token from the configuration settings within your Mail Agent.
TM_5001	LE_102	Credit exhausted.	Purchase new credits from the ZeptoMail Subscription page.
TM_8001	SM_127	Total number of attachments exceeding the limit.	Allowed total number of attachments < = 60.
	SM_127	Fields exceeding limits.	Total number of addresses exceeding the limit. The allowed number of unique values is 500 for each of these fields : i) reply_to ii) to iii) cc iv) bcc
	SM_129	Character limit exceeded for the name field for any of these parameters - from, to, reply_to, cc, bcc.	Allowed character limit < = 250.
		Subject field exceeding the character count limit.	Allowed subject line character count < = 500.
		Attachment size exceeding the limit.	Allowed attachment size < = 15 MB.
		Exceeding the character limit in attachment filename.	Allowed Attachment FileName Characters Length <=150.

Note:

Before you get started it is important to know that ZeptoMail is for sending transactional emails like welcome emailers, password resets emails, OTPs. We do not support sending of bulk emails or promotional emails like newsletters or marketing campaign emails. If you are looking for a bulk email provider, you can visit Zoho Campaigns.