Neil,
Here it is. I X'd out a few things that I did not want posted here. The one that works is the same (once you get past the greeting error) as the one that does not until you get to the <smtpSocketConnect> area. The main difference I see is that the computer name has an underscore in it. My home computer name has a dash. Could this be the problem and if so is it my host or PowerChurch that does not like it?
<SessionLog>
<Begin>2015-11-11T21:11:08</Begin>
<LogEntry>
<EntryTime>2015-11-11T21:11:08</EntryTime>
<Log><SmtpFailReason>GreetingError</SmtpFailReason>
<ChilkatLog>
<OpenSmtpConnection>
<DllDate>Aug 26 2015</DllDate>
<ChilkatVersion>9.5.0.52</ChilkatVersion>
<UnlockPrefix>POWERC.CBX0717</UnlockPrefix>
<Username>CHURCH_OFFICEHP:XXXXXX</Username>
<Architecture>Little Endian; 32-bit</Architecture>
<Language>ActiveX</Language>
<VerboseLogging>0</VerboseLogging>
<ensureSmtpSession>
<ensureSmtpConnection>
<SmtpHost>smtp.ipower.com</SmtpHost>
<SmtpPort>587</SmtpPort>
<SmtpUsername>
XXXXXX@nebible.org</SmtpUsername>
<SmtpSsl>0</SmtpSsl>
<StartTLS>0</StartTLS>
<smtpConnect>
<smtpHostname>smtp.ipower.com</smtpHostname>
<smtpPort>587</smtpPort>
<connectionIsReady>
<info>Need new SMTP connection</info>
</connectionIsReady>
<smtpSocketConnect>
<socketOptions>
<SO_SNDBUF>262144</SO_SNDBUF>
<SO_RCVBUF>4194304</SO_RCVBUF>
<TCP_NODELAY>1</TCP_NODELAY>
<SO_KEEPALIVE>1</SO_KEEPALIVE>
</socketOptions>
</smtpSocketConnect>
<smtpGreeting>
<readSmtpResponse>
<SmtpCmdResp>220 ESMTP Wed, 11 Nov 2015 21:11:09 -0500: UCE strictly prohibited</SmtpCmdResp>
</readSmtpResponse>
</smtpGreeting>
<ehloCommand>
<sendCmdToSmtp>
<SmtpCmdSent><![CDATA[EHLO CHURCH_OFFICEHP<CRLF>]]></SmtpCmdSent>
</sendCmdToSmtp>
<readSmtpResponse>
<SmtpCmdResp>501 Syntactically invalid EHLO argument(s)</SmtpCmdResp>
</readSmtpResponse>
<error>Non-success EHLO response.</error>
</ehloCommand>
<heloCommand>
<sendCmdToSmtp>
<SmtpCmdSent><![CDATA[HELO CHURCH_OFFICEHP<CRLF>]]></SmtpCmdSent>
</sendCmdToSmtp>
<readSmtpResponse>
<SmtpCmdResp>501 Syntactically invalid HELO argument(s)</SmtpCmdResp>
</readSmtpResponse>
<error>Non-success EHLO response.</error>
</heloCommand>
</smtpConnect>
</ensureSmtpConnection>
</ensureSmtpSession>
<error>Failed to connect to SMTP server</error>
<error>Failed.</error>
</OpenSmtpConnection>
</ChilkatLog>
</Log>
</LogEntry>
<LogEntry>
<EntryTime>2015-11-11T21:11:08</EntryTime>
<Log><ChilkatLog>
<CloseSmtpConnection>
<DllDate>Aug 26 2015</DllDate>
<ChilkatVersion>9.5.0.52</ChilkatVersion>
<UnlockPrefix>POWERC.CBX0717</UnlockPrefix>
<Username>CHURCH_OFFICEHP:XXXXXX</Username>
<Architecture>Little Endian; 32-bit</Architecture>
<Language>ActiveX</Language>
<VerboseLogging>0</VerboseLogging>
<sendCmdToSmtp>
<SmtpCmdSent><![CDATA[QUIT<CRLF>]]></SmtpCmdSent>
</sendCmdToSmtp>
<readSmtpResponse>
<SmtpCmdResp>221 bosauthsmtp10.yourhostingaccount.com closing connection</SmtpCmdResp>
</readSmtpResponse>
</CloseSmtpConnection>
</ChilkatLog>
</Log>
</LogEntry>
<End>2015-11-11T21:11:11</End>
</SessionLog>