Technical question involving email account I signed up for with Mylot.

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I have not been as active on Mylot as I was when I first signed up three years ago. Hence I have not checked my yahoo email account in over four months. So when I signed into it today to get back into the flow of Mylot I was told that my account had been deactivated because I had not signed into it in over four months. So I reactivated that account so I can get the Mylot alerts of when my friends post discussions but I am still receiving no mail from Mylot. I went to Mylot and updated my email info as Yahoo said that all mail sent to my yahoo account had been returned to sender. I only us this account for Mylot. I am still not getting any new emails. Any suggestions from anyone concerning this? Thanks in advance!