The following error appears in the
/var/log/maillog when a message with a big attachment is received:
plesk spamc: skipped message, greater than max message size (256000 bytes)
Default SpamAssassin configuration.
SpamAssassin does not check messages with attachments larger than 256KB. This value provides normal server loading.A larger value may cause heavy load on the server while processing big messages.
Starting from Plesk 11.5.30 there is an option to configure max mail size for SpamAssassin. Parameter
/etc/psa/psa.conf should be modified like as follows:
#grep "SA_MAX" /etc/psa/psa.conf
Keep in mind that
SA_MAX_MAIL_SIZE value is in bytes. In the example above SpamAssasin will check all messages with the size up to 768KB.