Environment: Listserv 1.8d with Sendmail 8.8.8 on Solaris 2.5 We have several large (1000-5000 subscribers) lists that are composed entirely of local addresses, and we expect the number of large lists to increase significantly in the near future. In an effort to force Listserv to send fewer, larger addressee lists to the campus mail server, we increased Listserv's MAXBSMTP setting. No matter what we did, however, it didn't seem to make any difference. Yesterday, we were tracing Sendmail and discovered that it was initiating multiple SMTP sessions to send a single message with multiple recipients on the same host. One of our Unix gurus went digging through the Sendmail source code and the 'bat book', to see if he could find a reason for this behavior. The 'bat book' has this to say (in part) in its discussion of TOBUFSIZE: "Note that one side effect of TOBUFSIZE is that it also limits the total number of recipients that can be delivered at once. If you need to increase that limit (and if you have a robust version of syslog), you can experiment by cautiously increasing TOBUFSIZE." Has anyone else encountered this? What, if anything, did you do to address the issue? pdr * ---------------------------------------------------------------------- * Paul D. Russell * Senior Systems Engineer * University of Notre Dame * Email: [log in to unmask] * Web: http://vma.cc.nd.edu/~prussell * ----------------------------------------------------------------------