Set myhostname and myorigin, some providers like 1&1 will do MX lookups on them so they need to be valid.
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		@@ -19,6 +19,7 @@ The following env variables need to be passed to the container:
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* `SMTP_SERVER` Server address of the SMTP server to use.
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* `SMTP_USERNAME` Username to authenticate with.
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* `SMTP_PASSWORD` Password of the SMTP user.
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* `SERVER_HOSTNAME` Server hostname for the Postfix container. Emails will appear to come from the hostname's domain.
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To use this container from anywhere, the 25 port needs to be exposed to the docker host server:
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