I would like to add a vote for the ability to send to multiple recipients.
Perhaps this will help @pavel
RFC 2822 section 3.4 in fact describes how multiples should be defined:
When it is desirable to treat several mailboxes as a single unit
(i.e., in a distribution list), the group construct can be used. The
group construct allows the sender to indicate a named group of
recipients. This is done by giving a display name for the group,
followed by a colon, followed by a comma separated list of any number
of mailboxes (including zero and one), and ending with a semicolon.
Because the list of mailboxes can be empty, using the group construct
is also a simple way to communicate to recipients that the message
was sent to one or more named sets of recipients, without actually
providing the individual mailbox address for each of those
That would give us this sample syntax:
Blynk.email("actionteam:firstname.lastname@example.org,email@example.com;","alert" ,"Come urgently");
If, in the back end you are throwing the email string at a fully compliant RFC2822 mail server I would expect it to ‘just work’ but a small test of this syntax did not produce the expected mails.