Sending API, SMTP & developer experience — found from sitemap — Postmark

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Facts read from this source

• Batch limits Report an error

  “Please note that the batch endpoint accepts up to 500 messages per API call, and up to 50 MB payload size, including attachments.”

• Recipient limit Report an error

  “Max 50 recipients - To, CC, BCC combined. Each address max 254 characters.”

• Sender signature required Report an error

  “Registered and confirmed Sender Signature is required.”

• Open tracking Report an error

  “TrackOpens boolean Activate open tracking for this email.”

• Link tracking options Report an error

  “Activate link tracking for links in the HTML or Text bodies of this email. Possible options: None HtmlAndText HtmlOnly TextOnly”

• Metadata support Report an error

  “Metadata object Custom metadata key/value pairs.”

• Attachments support Report an error

  “Attachments array List of attachments”

• Message streams Report an error

  “Set message stream ID that's used for sending. If not provided, message will default to the "outbound" transactional stream.”

• Auth token Report an error

  “X-Postmark-Server-Token REQUIRED This request requires server level privileges. This token can be found on the API Tokens tab under your Postmark server.”

• Tag statistics Report an error

  “Email tag that allows you to categorize outgoing emails and get detailed statistics. 1000 characters max.”

• Batch partial failure Report an error

  “Please note that the /batch endpoint will return a 200-level http status, even when validation for individual messages may fail. Users of these endpoints should check the success and error code for each message in the response from our API (the results are ordered the same as the original messages).”

• Replyto override Report an error

  “Reply To override email address. Defaults to the Reply To set in the sender signature. Multiple addresses are comma separated.”

• Subject limit Report an error

  “Subject line. Max 2000 characters.”

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