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How do you send it on their behalf, the on-behalf-of header or do you relay through their SMTP servers with their credentials?
by brazzledazzle 10y ago
How do you send it on their behalf, the on-behalf-of header or do you relay through their SMTP servers with their credentials?
- leesalminen 10y agoUsing headers. We use Mailgun for delivery (and provide docs on configuring SPF records).