Retry email bootstep on reset connection

Catches error seen in #781. Another nagios check is likely needed, but this should hopefully mitigate issues with the email bootstep going down.

LGTM. Can you add a change log entry please?

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• 4300c978 - retry email bootstep on reset connection

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• 7d75ddb0 - 1 commit from branch emfollow:main
• 91cd4506 - retry email bootstep on reset connection

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