Resend Sender
Paste your Resend API key each time (stored in session only). Upload an HTML letter and a TXT list of recipients (one email per line).
Resend API Key
From Name
From Email
Reply-To (optional)
Subject
Use stored draft (from last dry run) instead of uploading files
HTML letter file (.html)
Recipient list file (.txt)
If you don’t use stored draft, you must upload both files.
Send mode
Batch send (faster)
Single send (one by one)
Delay between sends/batches (ms)
0
250
500
1000
2000
Batch size (batch mode only, max 100)
10
25
50
100
Max emails (single mode safety cap)
50
100
250
500
1000
Dry run (validate & remember inputs/files, do not send)
Send