1)   X-Ray Mail Assistant 1.4 X-Ray Mail Assistant is an email header filter and POP/SMTP server switching tool. It runs as a local POP/SMTP relay server and scans your incoming and/or outgoing mail. 2)   X-Ray Mail Assistant Beta 1.5.0.149 X-Ray Mail Assistant is an email header filter and POP/SMTP server switching tool. It runs as a local POP/SMTP relay server and scans your incoming and/or outgoing mail.