Okay, I'm using drupal 4.7.3
Im using ipower as my hosts and for some reason on my 3rd package with them, the server I'm on needed the smtp module to send our mail. I set that up and it worked. Then recently it stopped sending email confirmations (w/ passwords) to new users. The error would be as follows:
Error sending email: SMTP Error: The following recipients failed: NEWACCOUNT@gmail.com From: ME-ADMIN@WEBSITE.com To: NEWACCOUNT@gmail.com
I checked all the settings, and I'm 99.99% sure I didnt touch/change anything related to module or site settings that would affect emailing. I played around with it and have found out that while the smtp module is inactive, the test function through that module works to send mail. BUT while still inactive the core drupal system cant send our forgot password emails, new account emails, or any email for that matter. While SMTP module is set to active, the test function within it DOES NOT work and the same error is shown as above. Core also doesnt work when smtp set to active.
I have even uninstalled/reinstalled smtp, and played around with it being on, different configs, no authentication, everything. No success. I have contacted my webhosts on this issue and awaiting a reply sometime soon. They said it was high priority for the issue but some how i have the feeling they dont understand the problem.
Now, the new twist to the glitch is that when install the adv user module (in order to mass mail members), i found that the mass mailer works sending out mail while the smtp function is off, but fails with the same error as above when smtp is on. The other thing is that with the adv user mass mail function, when working, it has no 'from' attribute in the emails. Where as everything else has had the sitename in the from field.