To cite package ‘emailvalidation’ in publications use:

Kukacka D (2023). emailvalidation: Client for the 'emailalvalidation.io' E-Mail Validation API. R package version 0.1.0, https://CRAN.R-project.org/package=emailvalidation.

Corresponding BibTeX entry:

  @Manual{,
    title = {emailvalidation: Client for the 'emailalvalidation.io'
      E-Mail Validation API},
    author = {Dominik Kukacka},
    year = {2023},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=emailvalidation},
  }