No affordable webmail client supports custom outbound SMTP across accounts
People consolidating multiple email accounts (custom domain, Gmail, Outlook, Yahoo) into one browser-based inbox find that major webmail providers have stripped out support for plugging in an external outbound SMTP server, causing authentication failures when sending from a custom domain. No budget-friendly unified webmail client fills this gap.
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Problem descriptions, scores, analysis, and solution blueprints may be updated as new community data becomes available.