> i get the following message when trying to send an email via mail.app
>
> The server response was: 5.1.2 Bad or missing RCPT domain
> c1sm5916038ugf
It's telling you there's a problem with the recipient's domain name. In
other words, there's a mistake in the address you're attempting to send
to and it's not the proper xxxx@yyyyy.zzz format.

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