Attachments now go both ways

Customers send screenshots and invoices, and you often need to send a file back. Both now work from the Slack thread.

Since November 6, files on a customer's email are added to the Slack thread, up to 10 files at 20 MB each.

Since November 7, files you attach to your reply in the thread are sent with the email, up to 10 files and 20 MB in total.

RelayMail doesn't keep the files. They pass straight between the email and Slack.