Posts by Matthew
Why are phishing emails being sent from verified and authenticated intuit.com servers?
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What List-Unsubscribe options are available for Outlook and why might they not be displaying?
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How can I bulk check and clean MX records for a list of domains?
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What are the risks and best practices for using mailto links in marketing emails?
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How can I report fraudulent emails and domains to Spamhaus and other relevant organizations?
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How to resolve SMTP 421 errors with Web.de and GMX.net due to rate limiting?
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What is xmr3.com and is it a legitimate email sending platform?
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Why is STARTTLS negotiation failing with the error 'connection died while negotiating STARTTLS TLS'?
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What is the best practice for using IP addresses in SPF records?
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How does Gmail handle dots in email addresses and can it cause issues?
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Why are emails showing as opened with Google Image Proxy IP when the recipient hasn't opened them?
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Will changing the sending subdomain impact email deliverability and require a new warm-up process?
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