Which action is permitted for e-mail use according to the guidelines?

The action that aligns with the guidelines for e-mail use is solicited mail. This refers to sending messages that the recipient has explicitly agreed to receive, ensuring that communication is consensual and relevant. This practice not only fosters a respectful communication environment but also helps maintain professional standards and compliance with organizational policies. Properly solicited mail avoids any potential issues related to harassment, unwanted communication, or misuse of resources, which can arise from the other options.