I sent my message and the SendStatus said “SENT”, but I later got a “bounceback” message in my regular email. Did my mail get sent or not?
In this case CustomMailer sent your message to your SMTP server, and your SMTP server sent it to your listed recipient(s), but the message did not get sent to that recipient. You will get a separate “bounceback” message for each recipient email not delivered. The “bounceback” message will usually provide some indication of why the email message did not go through. Usually it is because the domain in the recipient email address does not exist or the domain exists but there is no such username at that domain. But sometimes it is because the domain is temporarily off the air or the user’s mailbox is full, in which case trying again later may work. When there are multiple recipients in your TO, CC, or BCC, the “bounceback” only applies to the address(es) specified in the bounceback message and in general the email to all the other recipients has gone through.
