EMail header

Learn about Computer Security Virus/Malware Removal Assistance
1

Anyone know what or why this started showing up in all my email headers?
What is this?

X-YMailISG: Wprz1AsWLDtN2NhkYsoO_dbJqjfXQjDUmaGXiJ70siMGssFl
RP.XppgtlYoPeeQ3A9dVvvZPsKcXdRCPVA0U_kQKn_DCuu6_E.CzPTa8SttR
EF4Gg2d1cy.3rA9xEcJWikjFwkcgG_kwVEuMJ2gnjhqBO9qgB0vDfs3XlRtc
MQ5QYkVExcJwoMwUtp0H7uk1ClaO1LvTHqXFt8l7hv7nSzQyl_W2XZJNUEtj
HGOrSPJXmWGZmHmTlBpKhGokIrERNtj0cupXfeMYIk_8XDQqr_FZqWhglXgD
CzyHRPeNvwiQt7RQIY3fECQyRA4OQT_.lL6JaImsBPPQTYZEjCQBL6TMfDYa
rb0Weyn4meZYCI74aHjppzT.SA4s2p.XwLD3tDybgLU63jciXVeYdjMl8JcM
LJOYhfO3Hg1.VPOkP75MCuGyiTvby_L7nfAaCOIDnLOWKaFCPAwvoqCrNFH_

2

have no idea…looks like some site address :azn:

3

If you are a Yahoo mail user, that looks like a normal portion of the full email header.

4

anyway to investigate what the hell this is? >:-D