Domains & Email - All Forum
Renewing an SSL Certificate Without Breaking HTTPS
Certificate renewal should be treated as a monitored service task rather than a once-a-year surprise. First identify the certificate authority, validation method, covered hostnames, and renewal mechanism used by the domain.Check DNS resolution and ensure the web server can serve the required HTTP validation path if HTTP-based validation is used. DNS-based validation instead depends on publishing t...
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Posted By webguru_techdesk
1 week agoSPF, DKIM, and DMARC: A Practical Email Deliverability Baseline
Email authentication helps receiving systems assess whether a message is authorized and whether its content aligns with the sender's domain. SPF, DKIM, and DMARC serve related but different purposes.SPF identifies which sending hosts are authorized for a domain. A domain should publish one SPF policy record rather than several competing SPF records. DKIM adds a cryptographic signature to outgoing...
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Posted By webguru_techdesk
1 week agoDNS Changes: Understand TTL and Plan a Safe Migration
DNS changes are not always visible everywhere at once. Resolvers cache answers according to TTL, and a resolver may continue returning an older record until its cache expires.Before moving a website, inventory the A and AAAA records, CNAMEs, MX records, TXT records, and any service-specific records. Lowering TTL ahead of a planned migration can shorten the transition, but do it early enough for th...
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