I Can't Send an Email Blast
Three possible causes:
On a trial account. "Email blasts are not available during the 7-day Pro trial, upgrade to a paid Pro plan first."
Not yet verified. "First-time senders need one-time admin verification, typically clears within 24 hours, you'll get a notification when it's done."
Out of credits. "1 messaging credit per send, buy a pack at Dashboard → Upgrade."
Contact support if none of these apply.