How to fix Word couldn't send mail because of MAPI failure: “Unspecified error”

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Set Outlook As Default Email Client

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MSMapi File Updation

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Disable Third Party Add-in

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Increase Outlook Attachment Size Limit

[{"selector":"#anim-aba3f72b-8071-4e58-aea6-300da129317a","keyframes":{"opacity":[0,1]},"delay":0,"duration":1600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-aef04642-ea1b-44a0-82b7-a7ce8abab48b","keyframes":{"transform":["translate3d(0px, 98.09313%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-eecb0709-d316-468e-b702-44eee8b41595","keyframes":{"opacity":[0,1]},"delay":200,"duration":2000,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] Outlook does not send emails with attachments that exceed 20 MB. Increase Outlook Attachment Size Limit from Registry Editor.

Repair Microsoft Office installation

[{"selector":"#anim-1f6499ab-129a-41c0-bd7b-147a73343502","keyframes":{"opacity":[0,1]},"delay":0,"duration":1600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-dfe8dee2-f813-4459-9e3a-e74edc1e9bfe","keyframes":{"transform":["translate3d(0px, 98.09313%, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1600,"easing":"cubic-bezier(0.2, 0.6, 0.0, 1)","fill":"both"}] [{"selector":"#anim-14db7190-e23e-42e0-9658-74b007d1ba25","keyframes":{"opacity":[0,1]},"delay":200,"duration":2000,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] If you have start receiving the error after the installation of an Office application, try to fix the error by repairing the Office installation.

Remove Other Office Version

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Fixit Knowledge Base

[{"selector":"#anim-1795e800-e362-4436-bc3c-9bdc81969fdd","keyframes":{"opacity":[0,1]},"delay":300,"duration":1600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] www.fixitkb.com Automated Solutions for all your Software Problem Learn more