Problem with Cron Email Notification

I have two different cron jobs that run on the same days. The jobs are 7 hours apart. Both jobs are set to send notification emails when they start running.

Both jobs always run successfully, but I only receive an email from the first job. I never get the email from the second job.

What could possibly be happening?

0 3 * * 1-5 . ./.profile ; shell1.ksh 2>&1 | mail -s "Shell 1 is running" myemail@domain.com
0 10 * * 1-5 . ./.profile ; shell2.ksh 2>&1 | mail -s "Shell 2 is running" myemail@domain.com

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