# Email masking functions You can mask email addresses. | Function | Random masking | Consistent masking | Format-preserving encryption | Input data validation | | --- | --- | --- | --- | --- | | Mask email full domain by character | Yes | Yes | No | Yes | | Mask email left part of domain by character | Yes | Yes | No | Yes | | Mask email local part by character | Yes | Yes | No | Yes | ## Mask email local part This function masks all characters before the @ character. Two methods are available: By character and From a list of values. This function only applies on Strings. This function requires an extra parameter. | Option | Description | | --- | --- | | Method | When using the By
character method, this function masks what comes before the @
character with a character.

When using the From a list of values method, this function
masks what comes before the @ character with one of the values from the
specified list. | | Extra parameter | This function requires an extra parameter.

When using the By
character method, the extra parameter must be a character.
If you specify an invalid extra parameter, like a string, a list, multiple
characters or a digit, all characters before the @ character will be masked
with X characters by default.

When
using the From a list of values, the
extra parameter can be a comma-separated list of values or a path to a file
containing a list of values. If you do not specify an extra parameter, all
characters before the @ character are removed. | In the first example, all characters before the @ character are masked with the user-defined characters. In the second example, all characters before the @ character are masked with one of the values from the user-defined list. | Input value | Method | Extra parameter | Example of masked value | | --- | --- | --- | --- | | johnsmith@company.com | By
character | "p" | ppppppppp@company.com | | johnsmith@company.com | From a list of
values | "z,x,c,h" | xxxxxxxxx@company.com | ## Mask email full domain This function masks what comes after the @ character. Two methods are available: By character and From a list of values. This function only applies on Strings. | Option | Description | | --- | --- | | Method | When using the By
character method, this function masks what comes after the @
character with a character.

When using the From a list of values method, this function
masks what comes after the @ character with one of the values from the
specified list. | | Extra parameter | This function requires an extra parameter.

When using the By
character method, the extra parameter must be a character.
If you specify an invalid extra parameter, like a string, a list, multiple
characters or a digit, all characters after the @ character will be masked
with X characters by default.

When
using the From a list of values, the
extra parameter can be a comma-separated list of domains or a path to a file
containing a list of domains. If you do not specify an extra parameter, all
characters after the @ character are removed. | In the following example, all characters after the @ character are masked with one of the values from the user-defined list. | Input value | Method | Extra parameter | Example of a masked value | | --- | --- | --- | --- | | johnsmith@company.com | From a list of
values | "newtalend.com,newcompany.org" | johnsmith@newtalend.com | ## Mask email left part of domain This function masks what comes between the @ character and the dot in e-mail adresses. Two methods are available: By character and From a list of values. This function only applies on Strings. | Option | Description | | --- | --- | | Method | When using the By
character method, this function masks what comes between the @
character and the dot with a character.

When using the
From a list of values method,
this function masks what comes between the @ character and the dot with one
of the values from the specified list. | | Extra parameter | This function requires an extra parameter.

When using the By
character method, the extra parameter must be a character.
If you specify an invalid extra parameter, like a string, a list, multiple
characters or a digit, all characters between the @ character and the dot
will be masked with X characters by
default.

When using the From a list of
values, the extra parameter can be a comma-separated list of
domains or a path to a file containing a list of domains. If you do not
specify an extra parameter, all characters between the @ character and the
dot are removed. | In the following example, all characters between the @ character and the dot are masked with one of the values from the user-defined list. | Input value | Method | Extra parameter | Example of a masked value | | --- | --- | --- | --- | | johnsmith@company.com | From a list of
values | "newtalend,talendforge" | johnsmith@newtalend.com |