I have installed hMailserver in one machine and IIS smtp in another machine. Even though hMailsever itself is a smptp server.
I can't avoid this because the IIS Smtp server has some hooks which which encrypts and decrypts the incoming and outgoing mails. Since IIS smtp doesn't support to create & manage mail accounts, I thought of using hMail server.
I have a very old server that we cannot get rid of or update (as we don't know what might break). Until we completely git rid of all the client's on that server, I need a way to send mail using the mail command instead of sendmail or using the SMTP library for connecting to GMail or something like that.
I want to set up a lightweight outgoing mail server (actually on a Raspberry Pi, but I think this question has broader relevance so I am posting it here). This post notes that you need to have a "full-fledged" MTA relay your mail to use, e.g., ssmtp. It also warns that Bad Things will happen if you don't control the mail hub.
our Zimbra-Server isn't working for outgoing external mail since yesterday. Friday I installed some updates (for shell shock and Kernel updates), restarted and it worked fine. But since yesterday sending mail to external recipients stopped working.