MailReaderSampler with SSL authentication

**Tobias** ([Bug 64253](https://bz.apache.org/bugzilla//show_bug.cgi?id=64253&redirect=false)):
The issue is regarding MailReaderSampler with SSL authentication enabled on server side. In Wireshark I see a lot of handshake failed messages, because Jmeter is sending back a SSL "Certificate" message with a zero length certificate.

<MailReaderSampler guiclass="MailReaderSamplerGui" testclass="MailReaderSampler" testname="POP3 Sampler Port 995 " enabled="true">
<stringProp name="host_type">pop3s</stringProp>
<stringProp name="folder">INBOX</stringProp>
<stringProp name="host">xx.xx.xx.xx</stringProp>
<stringProp name="port">995</stringProp>
<stringProp name="username">praxis.dr.moritz.nullmayr${__threadNum}@tsi.komle.telematik-test</stringProp>
<stringProp name="password">gematik123</stringProp>
<stringProp name="num_messages">10</stringProp>
<boolProp name="delete">false</boolProp>
<stringProp name="SMTPSampler.useSSL">true</stringProp>
<stringProp name="SMTPSampler.useStartTLS">false</stringProp>
<stringProp name="SMTPSampler.trustAllCerts">true</stringProp>
<stringProp name="SMTPSampler.enforceStartTLS">false</stringProp>
<stringProp name="SMTPSampler.useLocalTrustStore">false</stringProp>
<stringProp name="SMTPSampler.trustStoreToUse"></stringProp>
<stringProp name="SMTPSampler.tlsProtocols"></stringProp>
</MailReaderSampler>

Severity: critical
OS: All