I'm just beginning to look at Postfix configurations (at a very leisurely pace I might add).
I come from a mostly Exim background, so the configuration of Postfix is really somewhat foreign to me. In an SMTP transaction there are certain commands that pertain to certain areas of the SMTP message, specifically: MAIL FROM RCPT TO DATA In Exim, there is an ACL configuration block - acl_smtp_mail - that can be used to parse the information presented in the MAIL FROM command and this determines if the connection should be allowed to proceed. Likewise, there is an ACL configuration block - acl_smtp_rcpt - that parses the information from the RCPT TO command and determines how to proceed along the connection. And the ACL Configuration block - acl_smtp_data - that can parse the information presented after the DATA command to determine how to proceed with the connection. Are there any equivalent such configuration blocks with Postfix? Or how would one go about processing information given from these commands?
