Question 1

What is postmark.com's Open Graph type?

Accepted Answer

postmark.com declares `og:type` as `website`. This tells Slack how to categorize the content when generating a preview.

Question 2

Does postmark.com declare image dimensions?

Accepted Answer

postmark.com sets `og:image` but does not include `og:image:width` and `og:image:height`. Explicit dimensions let platforms render the preview faster without downloading the image first.

Question 3

What headline does postmark.com use for social previews?

Accepted Answer

postmark.com's social headline is "Postmark: Fast, Reliable Email Delivery Service | SMTP | API" (60 characters).

Question 4

What description does postmark.com use for social previews?

Accepted Answer

postmark.com's social description reads: "Send transactional and marketing emails and get them to the inbox on time, every time. Postmark is a fast and reliable email delivery service for deve…" (157 characters).

Question 5

What's the biggest issue with postmark.com's Slack preview?

Accepted Answer

Image won't fit social cards (240×240, 1:1). Your square-ish image will be cropped to 1.91:1 on Facebook, LinkedIn, and Slack, and to 2:1 on Twitter. Use 1200×630 (universal) or 1200×675 (Twitter-optimized) for predictable rendering.

Question 6

How can I improve postmark.com's social previews?

Accepted Answer

Review the recommendations above - they list specific issues and provide ready-to-paste meta tag snippets. The highest-impact fixes are usually a properly sized `og:image` (800×418), a clear `og:title` under 60 characters, and a 50-155 character `og:description`.

How postmark.com Looks on Slack

Slack preview

Slack

Your social image needs work

Recommendations

Frequently Asked Questions

See postmark.com on other platforms

Validate other sites on Slack

Validate your own URL