Channel entry notifications are not working on new entries generated by SafeCracker. This seems to be a recent development, as the notifications were working previously. The only change has been in updating EE versions and a change to the client's SMTP servers. We tried switching to PHP and Sendmail, and now are working with a new SMTP account.
I believe I've narrowed it to a problem between SafeCracker and the channel. Email notifications are working via FreeForm and Tools > Communicate.
Strangely, I did receive 2 new entry notifications via the forms submitted by real users, but the client (whose email address was also in the recipients list) did not, and I was unable to replicate success using test form submissions.
Channel entry notifications do work just fine when manually adding a new entry in the Control Panel.
Has anyone experience something similar to this, or have any ideas about what might be preventing notifications from being sent?
EE version 2.5.2