When can you send multiple email addresses in the To field?

Sending multiple email addresses in the To field is typically accepted when those email addresses are separated by a semicolon. This method allows the email client or service to recognize each address as a distinct recipient. Semicolons are often used to delineate multiple email addresses in various email applications and programming contexts, including those in integration platforms like Boomi.

Using a comma might work in some contexts or with certain email clients, but semicolons are generally the more widely accepted standard for separating email addresses to ensure proper processing of the list of recipients. This prevents any potential confusion or misinterpretation of the addresses.

In a typical email scenario, sending only one email at a time is not a standard practice for the To field as email clients are designed to handle multiple addresses. While SSL (Secure Sockets Layer) is related to encryption and the security of email transmission, it does not dictate how email addresses are listed. Therefore, the method of separating email addresses is key to successfully delivering messages to multiple recipients.