I’m looking for a simple sendmail replacement to receive local mail, such as from cron and service failures and forward it to on to a real SMTP server.
I have used msmtpd successfully but thought I’d ask if folks have other solutions they like.
I’m looking for a simple sendmail replacement to receive local mail, such as from cron and service failures and forward it to on to a real SMTP server.
I have used msmtpd successfully but thought I’d ask if folks have other solutions they like.
You want an SMTP relay. You can use a free public SMTP relay, or make one yourself with something like Postfix. If you make one yourself, don’t keep it open, or spammers will abuse it. If you’re sending mail properly, you’ll need to add it to your SPF entry in your DNS. If you’re just sending mail for yourself, you should be able to set up a filter in your email provider so that it doesn’t get rejected.
You also need to know if outbound traffic is blocked on port 25 by your ISP. Most ISPs block it to prevent spam. If yours is blocked, you can request that they unblock it, but they might not do it. If they don’t, you’re kind of SOL. At that point, you need an account somewhere to send mail through. Then you’d be connecting on port 587 to submit mail.
I have an SMTP server. I need a sendmail binary that does one thing well: send the message to the SMTP server.
Can’t you use sendmail? Also, check out my updated message above. You’ll need to make sure you can send outbound traffic on port 25.
Sendmail is a binary provided by a mail system and no mail system is installed by default on Fedora.
I’m looking for a solution that’s as simple as possible: provide a sendmail binary to pass the message to a third-party SMTP server.
I’ll connect to Mailgun via TLS— no port 25 involved.
Sendmail is provided by the
sendmailpackage in Fedora. Here’s some instructions on installing and configuring it:https://tecadmin.net/install-sendmail-on-fedora/
But you might instead be looking for an SMTP client (or a Mail User Agent), which is different:
https://www.baeldung.com/linux/send-emails-from-terminal
If you have SMTP credentials with Mailgun, and you’re using port 465 or 587, you want an MUA, not an MTA (Mail Transfer Agent).
Sendmail can be both, but there are better tools if you’re looking for an SMTP client.