Function to email all Contacts related to Account in a single email?

I've successfully created a function that will email each Contact related to an Account (or Company as it is labeled), but am seeking help to improve the function. I would like to do it as a single email from the Account Owner where all contacts are in the "To" line. Is this possible? Would appreciate any help from the community.

Here's the function:

relatedcontacts = zoho.crm.getRelatedRecords("Contacts","Accounts",input.accountId.toLong());

//info relatedcontroles;

for each cont in relatedcontacts

{

emailAddress = cont.get("Email");

info emailAddress;

sendmail

[

from :zoho.loginuserid

to :emailAddress

subject :"Welcome! Let's create your account and get started!"

message : "Message"

content type :HTML