The Zoho Creator sendmail task documentation is lacking. While developing a script to automate the sending of emails in a Zoho Creator app, I was surprised by how much was missing from the official documentation of the sendmail task. I found myself hunting for any example of the sendmail syntax so that I could piece together a functional script. Here what I was able to dig up.

sendmail
         [
             from : "example@email.com"
             to : "example@email.com"
             cc : "example@email.com"
             bcc : "example@email.com"
             reply-to : "example@email.com"
             subject : "Example Subject"
             message : "<b>Example Body</b>"
             content-type : "HTML"
             attachments : file:input.first_attachment_field, file:input.second_attachment_field
         ]

from	required	string	Needs to be a valid email address. Will be displayed as the sender email to recipients.
to	required	string list of strings	Can be a single email address or a comma separated list of email addresses.
cc	optional	string list of strings	Similar to the To field.
bcc	optional	string list of strings	Similar to the To field.
reply-to	optional	string list of strings	Similar to the To field.
subject	required	string	Will be displayed as the subject of email to recipients.
message	required	string	Will be displayed as the body of the email to recipients. Can contain HTML markup.
content-type	optional	string	“HTML” or “Plain Text”. Defaults to “HTML” if not provided. Displays the email to the recipient either with the HTML formatting or in plain text.
attachments	optional	file list of files	Must be in the format “file: <file_upload_field>”. Can be a single attachment or multiple attachments comma separated.

While you can use variables and concatenation within the sendmail block, you won’t be able to include any conditionals (i.e. If statements) or loops. If this level of logic is required, be sure to generate your strings or lists prior to the sendmail block and save it to a variable, which you can then use inside the block.

I ran into some further frustration when trying to attach a variable number of attachments to the email. See my post titled Zoho Creator Sendmail with Many Attachments for a work around.

If you’ve identified any additional parameters for the sendmail task that aren’t listed, please let me know.