.png "Network ports for clients and mail flow in Exchange 2013: Exchange 2013 Help | Microsoft Learn")
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![SOLVED] Ghost process on SMTP port authenticating towards mail server - Windows 11](https://content.spiceworksstatic.com/service.community/p/post_images/attached_image/bf0b7615-6310-4266-914d-b3433d2eb64d-port-587-weird2.png "SOLVED] Ghost process on SMTP port authenticating towards mail server - Windows 11")
SOLVED] Ghost process on SMTP port authenticating towards mail server - Windows 11
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Which SMTP Port to Use for Email: 25, 587, 465, or 2525?
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