Mail

Delivery, authentication and server problems.

Section Mail

Delivery, authentication and server problems.

Delivery and spam Why mail is rejected and how to clean it up.
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Spam score

Score results, blacklists and fixes.

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SPF, DKIM and DMARC

Authentication records and alignment.

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Bounced mail

550, 554 and other delivery errors.

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Servers and clients SMTP, IMAP and mailbox setup.
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SMTP and IMAP

Connection, ports, STARTTLS and login errors.

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Mail clients

Outlook, Thunderbird and phone setup.

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Subcategory

Forwarding and hosting

MX, catch-all and host settings.

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