Hi, I got the same problem here. Have you found any solution ?

I have already read this post:https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/about-sending-e-mail-by-adobe-campaign-v7/m-p/288561#M11456but it was almost 7 years ago,  do we still HAVE TO build a mta server NOW? 

Hello, I am currently using Adobe campaign 7.3.2, which we deployed on Linux ourselves. I would like to use a third-party SMTP service, and the configuration of SMTP is as follows:Host&port=hwsmtp. email. xxx. com: 465Protocol=smtpEmail address= noreply@xxxxx.cnPassword=iwxxxxxxxxxxxxxxI'm not quite...