DNN 7 - SMTP Test in host settings work, but can't send emails in contact forms - dotnetnuke

Question

All the sites on this DNN installation stopped sending emails yesterday. When you try and test SMTP in host settings, it sends the test email without any issues.
At first I thought my IP might be blacklisted, but then surely the SMTP test would also fail?

Answer 1

I'm pretty sure the Test SMTP setting in Host directly calls the send mail service in DNN's API. But many other emails are queued up for dispatch for scalability.
Check to see if your "Messaging Dispatch" job in Host > Scheduler has been disabled. If not, check the history by clicking the Log icon on the right-hand side of the schedule tasks list. See if there are errors logged in there.
If all is good there, check your Logs in /Portals/_default/Logs for any issues related to messaging or SMTP.

Answer 2

I would start by checking to see if you have defined a valid (usable) email address on your ADMIN account. DNN will "send" emails from whatever the Administrator is in the site settings, so check the email address on that user's profile, make sure that the email/domain is valid and the SMTP settings you are using are allowed to send from that domain.

Answer 3

If you are developed contact-form dynamic module in your DesktopModules folder then you have to call below DNN SendMail method in your submit button click event.
DotNetNuke.Services.Mail.Mail.SendMail(FromEmailAddress, ToEmailAddress, CCEmailAddress, BCCEmailAddress,
DotNetNuke.Services.Mail.MailPriority.Normal,
EmailSubject,
DotNetNuke.Services.Mail.MailFormat.Html,
System.Text.Encoding.UTF8,
EmailBodyMessage, "", "", "", "", "");