Client's Initial Solution

• promiscuous_relay By default, the sendmail configuration files do not permit mail relaying (that is, accepting mail from outside your local host (class {w}) and sending it to another host than your local host). This option sets your site to allow mail relaying from any site to any site. In almost all cases, it is better to control relaying more carefully with the access map, class {R}, or authentication. Domains can be added to class {R} by the macros RELAY_DOMAIN or RELAY_DOMAIN_FILE (analogously to MASQUERADE_DOMAIN and MASQUERADE_DOMAIN_FILE, see below).

• Spammers found the open relay

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