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10033 SMTP 421 Service not available closing transmission channel Error (#ERRN10K33SMTP01)

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20151008 (Andy)   Pro, MultiUser, MultiSite, MultiView   Self Storage EditionMarina EditionVault Edition   n/a   n/a   n/a

What is a "10033 SMTP 421 - Service not available, closing transmission channel" error?

This error may appear when trying to send email from StorMan. If you receive this error, it means that your email provider has closed the email communication channel while StorMan was trying to send emails.

Some internet service or hosting providers will close email communication channels if they suspect a user is spamming. Sometimes, running Daily Processing (where many emails are sent at the same time) causes some email servers to think that you are trying to send email spam and thus, they will terminate the connection.


How do I fix the error?

As the issue lies with your internet service or hosting provider, you will need to contact them to get them to adjust their settings for the outgoing (SMTP) email server that you use. You can locate this server name under Maintenance, then Email & Event Log Setup - in the Sending (Outgoing) section. If they cannot do this for you, then the only remaining options are to send emails a few at a time - or change to another email provider with less-strict settings.

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