I would use log4net and the email appender. There are plenty of example configuration for it. A little more advanced example with level and filter is:

<appender name="EmailAppender" type="log4net.Appender.SmtpAppender">

<evaluator type="log4net.Core.LevelEvaluator">

<threshold value="DEBUG"/>

</evaluator>

<!-- The filters are processed in order:

1) match the Inserted New User message

2) match any WARN or higher messages

3) reject everything else -->

<filter type="log4net.Filter.StringMatchFilter">

<stringToMatch value="Inserted a new user" />

<acceptOnMatch value="true" />

</filter>

<filter type="log4net.Filter.LevelRangeFilter">

<levelMin value="WARN" />

<acceptOnMatch value="true" />

</filter>

<filter type="log4net.Filter.DenyAllFilter" />

<!-- The SmtpAppender authenticates against the mail server, the buffersize of 10 provides 10 lines

of context when an error happens. -->

<subject value="LinkedCells: Production log event" />

<to value="notifications@LinkedCells.com" />

<from value="notifications@LinkedCells.com" />

<password value ="password" />

<smtpHost value="MAILSERVER" />

<bufferSize value="10" />

<lossy value="true" />

<layout type="log4net.Layout.PatternLayout">

<param name="ConversionPattern" value="%5p [%d] - %m%n" />

</layout>

</appender>

Thanks Daniel! I'll give that a go.