how can i send mails serially

[lkhanna]

Dear all,   I am using qmail 1.03 on Red Hat 6.2 . I am providing mailing solution to varrious domains which are listed in my locals as well as in my virtualdomain files. Mx pointing of all these domain is my qmail server.   For few domains i am simple forwarding mails to their destination server by maiking a default alias in /var/qmail/alias directory. But i am doing this forwarding by making SMTP connection with destination servers .   For example if 15 mails are coming to mail server for a domain at a particular time, then qmail is making 15 simultaneous connection with remote server and try to send all the 15 mails to that particular domain at the same time, and max time it happens that bandwidth get choked and some of the connection get dropped and those mails remain in queue .   Is there any way by which i can send mails serially , one by one . Can i achive the same thing by implementing serial mail . And what all i have to do to implement the serial mail .   Or is there any another solution , other than serial mail ???   I am using mailbox format right now. And using qmail 1.03-8.   Pl suggest any sol'n for above problem.   Regards   lokesh