The "no valid recipients" message is coming from a croak statement in the Email::Send::Gmail module.

The problem as is turns out is an error in the module code that varifies the recipient addresses. The current version of the module finds an error with multiple addresses when there is none.

The fix was simple. Just needed a pair of parentheses around line 57: 

<<<    my @ok = $smtp->to( @to, { SkipBad => 1 } )
>>>   (my @ok = $smtp->to( @to, { SkipBad => 1 } ))

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I have sent an email to the maintainer to this effect. Hopefully he will find time to make the change.

In reply to Re^2: Multiple Recipients in email by rpoyner
in thread Multiple Recipients in email by nephorm

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