Domain Check (verify if the domain is active and valid)
Posted: Thu Mar 27, 2025 9:35 am
Second, these addresses can easily generate hard bounces (undeliverable emails), which would negatively impact your sender reputation.
This process determines the MX (Mail Exchange) entry of the domain being validated in the DNS (Domain Name System, or the Internet's "telephone directory").
The MX entry is critical because it is the basic female database of which mail server handles email for that specific domain. Without a valid MX entry, email sent to a domain may not be delivered properly.
It is important to note that a domain may not have a valid MX entry for a variety of reasons, such as technical issues or an inactive domain. If the MX entry is missing or invalid, no communication should be sent.
E-mail syntax check (check the structure and completeness of the email address syntax)
The syntax check verifies whether the email address structure is correct according to the RFC 5322 (Internet Message Format) and RFC 5321 (Simple Mail Transfer Protocol) standards. The first part of the address, with a maximum length of 64 characters, can be composed of Latin letters, numbers and some special characters, both uppercase and lowercase. This part is followed by an “@” (at sign) and then by the second part of the email address, which indicates the domain name and can be up to 253 characters long.
This process determines the MX (Mail Exchange) entry of the domain being validated in the DNS (Domain Name System, or the Internet's "telephone directory").
The MX entry is critical because it is the basic female database of which mail server handles email for that specific domain. Without a valid MX entry, email sent to a domain may not be delivered properly.
It is important to note that a domain may not have a valid MX entry for a variety of reasons, such as technical issues or an inactive domain. If the MX entry is missing or invalid, no communication should be sent.
E-mail syntax check (check the structure and completeness of the email address syntax)
The syntax check verifies whether the email address structure is correct according to the RFC 5322 (Internet Message Format) and RFC 5321 (Simple Mail Transfer Protocol) standards. The first part of the address, with a maximum length of 64 characters, can be composed of Latin letters, numbers and some special characters, both uppercase and lowercase. This part is followed by an “@” (at sign) and then by the second part of the email address, which indicates the domain name and can be up to 253 characters long.