I have a couple of modules that use SMTP, modules for email marketing and also a store module.

These just seem unable to successful send mail via gmail which our domain now uses.  The port, username, password etc are all correct but not a single test is successful.

DNN seems fine with it in Host settings (no port entered) but not these other modules.

Have others had these problems?

It's both the OnyakTech Axon module, and Catalook that are having the problems.

Both of these have their own SMTP settings entered.

With Axon I'm using my own mail server to send mail since the gmail won't work (smtp.gmail.com:465) which is ok but less than ideal (means I have to maintain mailserver, own emails are trapped by it etc).

Tried to do the same with Catalook but the SMTP has the SSL tied to the DNN Host settings... rather strange as the settings are otherwise separate. Means the gmail (which uses SSL) can't be used in Host as my mailserver doesn't use SSL but has to be the same.

Just so frustrating as the few 3rd party modules I'm still using just don't seem able to get it right.

I certainly understand that - have portals tied to the host email which really isn't the greatest.

Seems 3rd party modules make it just that little bit more difficult too.

Catalook has SMTP settings separate to the DNN host... except SSL which must be the same.  Now Gmail needs SSL, works fine via DNN Core but Catalook just doesn't work.  But because the SSL is linked I can't get Catalook to work with my own mailserver.

Again - leaves me forced to change the DNN host to my mailserver which I don't want to do - just because Catalook has this link which seems a little daft when the other SMTP settings are independent.