Can multiple email addresses *with names* be pasted into

I read this post, but it doesn't answer my question:

I have noticed that it seems to be possible to include a name along with an email address, even for names/emails that are not in my address book. After the email is sent, looking at the header shows blue bubbles with the correct name for each email address.

However, when I try to paste multiple email addresses along with names, I can't tell what is going to do with them. It doesn't turn them into the blue bubbles that make it intuitive. (It seems to only do this after the email is sent.)

Example of the format I'm talking about:

Joe Blow
Jimmy Dean
Sally May

By contrast, when a list formatted like the following is pasted into a recipient field, all the email addresses immediately turn into individual blue boxes that indicate how will separate them:,,

Possibly related; when I saved a draft that included multiple email addresses in the BCC field formatted like this, and opened the draft later, I found all but two emails (out of about fifteen) had disappeared from the BCC field.

Is there a correct standard format for pasting multiple names and email addresses into a recipient field? (Not names from the address book.)

If so, what is it?

Best Answer

The expected format for multiple e-mail address is:

Joe Blow <>
Jimmy Dean <>
Sally May <>

Copying and pasting this into on macOS 10.12 works as expected. Three people are added to the e-mail; each with their name associated with the e-mail address.

Individual entries can be separated by a comma:

Joe Blow <>, Jimmy Dean <>, Sally May <>

The angle bracket format originates from RFC 822 Section-6.1. This Request For Comment (RFC) defined the basis of the e-mail standard used on the Internet.