We have a customer requesting to have support for attaching CDR files because their clients (who are also using MailerSend and are on Starter plans) are advertising agencies that require this.
Customer feedback:
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Why you are not support cdr format?
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After explaining the file types that we support:
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but my clients in starter plan is advertising agency - its not possible to wait...can you do this now?
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In the meantime, I advised them to use the .zip format as a workaround.