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DNS SOA Serial Number Format

What you see when your domain has this problem
SOA Serial Number Format is Invalid Details area Ignore
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More Information About Dns Soa Serial Number Format

The serial number is an unsigned 32 bit value assigned to your SOA record must be between 1 and 4294967295.

We will issue a warning if your serial is either invalid by being outside of the allowed range or if it does not conform to this format.

Additional Information

It has become common to set your serial number with a date format to make it easier to to manage. This format uses 10 digits to represent the date and then a two digit sequence number with the format of YYYYmmddss.

DMARC is the key to improving Email Deliverability!

Email is the key to your customer communication strategy. But, what is your email reputation?

Setting up and managing your DMARC configuration is the key to getting insight into your email delivery. MxToolbox is the key to understanding DMARC.

MxToolbox Delivery Center gives you:

  • Who is sending phishing email purporting to be from your domain
  • What is the reputation of your domains and delegated IPs
  • Where other senders are and What their reputations are
  • How your SPF, DKIM and DMARC setup is performing
  • What on-going maintenance you need to maintain and improve your email deliverability

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