One bad blast can burn a number and a brand.
Do
Collect opt-ins, keep messages under a clear CTA, and stop lists that never convert.
Next step
Control list quality before writing the offer
Use the following worksheet to turn this article into an operating decision. It is a practical plan for a Bangladesh small business, not a claim about a particular client or an industry benchmark. Adapt it to your current workflow and constraints.
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Separate customer service messages from promotions and document the basis for each recipient list. Avoid purchased or scraped contact lists.
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Set a useful frequency and a clear stop method. Suppression must apply to the next campaign, not only the current file.
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Review delivery failures, complaints and meaningful responses after a small test. Pause the campaign if list quality is unclear.
Write this before requesting proposals
Describe the current process, the failing step, the intended users and what a correct outcome looks like. Prepare representative test data so suppliers can demonstrate the same task. Ask separately about recurring costs, third-party dependencies and work excluded from support.
When to change the plan
Resolve missing access, failed acceptance checks or unclear team ownership before paying for the next stage. Use evidence from a small pilot. If scope grows, agree revised time and costs rather than relying on unsupported guarantees.