Rendering multipart/alternative in webmail: pitfalls
Webmail usually prefers the HTML part of multipart/alternative—validate both parts, avoid contradictory content, and preview safely before trusting links.
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Mailby blog — temporary email guides
Practical decision guides on disposable inboxes, OTP delivery, privacy, and email testing — written for real workflows, not keyword filler.
Showing 55–63 of 109
multipart/alternative on mobile: examples and pitfalls
Mobile clients pick one multipart/alternative part—usually HTML when present. Build sane text parts and avoid relying on a single raw MIME tree.
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Rendering multipart/alternative in a desktop email client
Desktop clients pick one part from multipart/alternative—usually the richest safe type. Broken boundaries and mismatched content create blank or misleading views.
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Rendering inline images in a webmail client: examples and pitfalls
Inline images in webmail depend on correct multipart/related CID links—broken Content-ID references show empty slots, and remote images raise privacy risks beyond CID parts.
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Inline images in mobile email clients: examples and pitfalls
Mobile clients often block or detach CID inline images—build multipart fixtures deliberately, test with images off, and keep critical content in text.
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Rendering inline images in a desktop email client: pitfalls
Inline images need correct MIME multipart/related and Content-ID links; broken CIDs show empty frames—test fixtures before blaming the client.
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Rendering base64 attachments in webmail: pitfalls
Webmail must decode base64 MIME parts safely—valid fixtures render; broken padding, wrong types, and active content should not execute.
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Base64 attachments in mobile email clients
How mobile email clients render base64 attachments: valid MIME parts, broken padding, declared types, and safe preview practices.
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Rendering base64 attachments in desktop email clients
Desktop clients decode base64 MIME parts using Content-Type and Content-Disposition—broken padding or wrong types show as garbage or blocked attachments.
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