Fastmail reminded me when I forgot an attachment
by prirun on Hacker News.
I’m switching to Fastmail, and today when I tried to send an email, I got a popup window saying “It looks like you might have forgotten to include the attachment, because you wrote ‘Attached is’ but there is no attachment”. And it was right! Wow, what a great feature! I can’t even say how many times I have forgotten attachments and had to send a follow-up email.