I have a mailing list that sends out mails to some 5000 users everyday.
When I send a message to the list, a single mail appears in the
/var/spool/mqueue directory and the qf file contains the address of all
the 5000+ users to which the mail must go.
When I do a ps, I always see a single sendmail session in progress. I
assume that sendmail goes through the list one-by-one basis. Since I
do not host a lot of mailing lists, and the load remains well under 0.50
on average, I'd like to speed up the delivery of the mail sent to the
list. I *guess* that if I could somehow split the message in a number of
mail task, I could speed up the process. Am I right?
Moreover, how can I make sendmail *NOT* to show the 'alias' (that
represents the file containing the addresses) in the headers of the
messages sent out to the list.
Any help is appreciated.