public boolean isValidEMail(String sEmail) {
		int iAt;
		String sMethod = CLASS + ".isValidEmail";
		if (this.log.isLoggingDebug()) {
			this.log.logEnter(sMethod, (Object) sEmail);
		}
		if ((iAt = (sEmail = sEmail.trim()).indexOf(64)) >= 0) {
			String sUser = sEmail.substring(0, iAt);
			String sDomain = sEmail.substring(iAt + 1);
			sEmail = sUser + "@" + IDN.toASCII(sDomain);
			if (this.log.isLoggingDebug()) {
				this.log.logDebug(sMethod,
						(Object) ("E-Mail nach IDN-Auflösung: '" + sEmail + "'"));
			}
		}
		boolean bResult = false;

		org.apache.commons.validator.routines.EmailValidator apacheValidator = org.apache.commons.validator.routines.EmailValidator
				.getInstance();
		bResult = apacheValidator.isValid(sEmail);
		if (this.log.isLoggingDebug()) {
			this.log.logReturn(sMethod, (Object) bResult);
		}
		return bResult;
	}