How can I bulk check and clean MX records for a list of domains?

Bulk checking and cleaning MX records for a list of domains can be achieved through various methods. Command-line tools like `dig` and `nslookup` are frequently recommended, with `dig` being noted for its scripting capabilities for automation. MXToolbox SuperTool and similar online tools offer MX record lookups, with some providing paid API access for bulk checks. SQL scripts, along with database extensions, are useful for categorizing and cleaning records, especially identifying dotMX, null MX, and hosted domains. Validating MX records includes checking for syntax errors like trailing dots and ensuring correct IP addresses. Proper MX record configuration is vital for email deliverability; in the absence of MX records, RFC guidelines suggest falling back to the A record. Cleaning typically involves removing invalid, outdated, or misconfigured records via the domain's DNS settings. Maintaining accurate MX records and performing checks after DNS changes are crucial for email delivery reliability.

To bulk check and clean MX records, various methods can be employed. Command-line tools like `dig` and `nslookup` are popular, often used in scripts to automate checks for multiple domains. Online tools such as MXToolbox also offer bulk checking capabilities, sometimes via paid APIs. Cleaning involves identifying and removing invalid, outdated, or misconfigured MX records through the domain's DNS settings. Valid MX records are crucial for proper email routing and deliverability. When no MX record is available, senders should fall back to the A record. Checking for common errors like trailing dots or incorrect IP addresses is also important during validation.

Bulk checking and cleaning MX records involves several methods highlighted by experts. Command-line solutions like `dig` can be used with a file input to test multiple domains, generating a CSV output. SQL scripts can categorize domains that don't accept mail based on dotMX, null MX, or hosted domains. Validation should include checking for syntax errors like trailing dots and incorrect IP addresses. Correct MX records are crucial for email delivery, and incorrect records can lead to bounces or lost emails. DNS lookup tools can verify MX records.

Documentation highlights various methods for checking MX records. Google's Dig tool in the Admin Toolbox provides detailed record information but requires manual input. The `dig` command, as detailed by ISC, offers options for specifying query types and output formats, with `+short` for cleaner output. `Nslookup` also allows querying of MX records via the command line by specifying 'set type=mx'. When no MX records are found, RFC specifications dictate falling back to the A record for delivery.