Practical notes on running email and WhatsApp campaigns at volume.
Statements, invoices and policy documents all share a problem: the message is generic but the file is not. Here is how per-recipient attachments actually work, and what to check before a bulk send.
Read the guide ↗SPF, DKIM and DMARC decide whether your mail reaches the inbox. Most deliverability problems are one missing DNS record, not your content.
Read the guide ↗A customer answers your WhatsApp campaign. From that moment you have 24 hours to reply freely — after that, only an approved template will reach them. Here is how to work with the rule instead of against it.
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