Apply a Signature Based on Sender Domain

In some scenarios, you may want to apply a specific signature only when the email is sent from a particular domain. This can be achieved by creating a Rule in the Crossware Designer Portal that checks the sender’s domain and applies the correct signature accordingly.

Create a Rule

1. In the Admin section, open Rules.

2. Click CREATE NEW.

3. Create a new rule (e.g., DomainSelection).

4. Under Rule Type, click Advanced Formula.

5. Add the C# script provided below.

List < string > strList = new List < string > ();
strList.Add("@gmail.com");
strList.Add("@crossware365.com");
if (EmailProperties.ContainsKey("SMTPRCPTTO")) {
  foreach(string strItem in strList) {
    if (EmailProperties["SMTPRCPTTO"].IndexOf(strItem, StringComparison.OrdinalIgnoreCase) >= 0) {
      return false;
    }
  }
}
return true;

• Replace gmail.com and http://crossware365.com with the domain you want to check.

• This rule will evaluate the sender’s domain and return true only if it matches.

Link the Rule to a Signature or Signature Block

• Signature

• Signature blocks

Test the Setup

• Send a test email from the specified domain.

• Confirm that the signature is properly appended only when the sender’s domain meets the rule criteria.