We've been using FMP (11v4) for years to automatically generate emails sent individually to various groups of people. FMP is running the source database on a server.
Over the summer, the two positions that run the scripts generating and sending these emails (via the email client, not the SMTP-direct method) updated their computer systems from old desktop Macs to new MacBook Pros (OS 10.7.4).
Suddenly our email scripts are hanging either both FMP and Mac Mail, or just Mac Mail. After force-quitting the applications after the first attempt, and then restarting both apps it turned out that the script-Mail combo had actually sent only 21 of 51 total emails. Attempting again, the remaining 30 ended in 15 emails being sent and a hang in Mac Mail, only. Two final attempts ended up sending the remaining emails and hanging Mac Mail.
I've read a seemingly related discussion concerning error msgs being generated, but we're not receiving error msgs. I did click on "report" to send a report to Apple about this, but that just seems like sending notification to Outer Darkness.
Would be willing to attempt sending emails from SMTP directly (the only other option in FMP), but am unsure where/how to verify "default" email client, and have never used this method before so would need some pointers on that as well!
Thanks in advance for any assistance you can provide.