I'm looking for alternatives to SMTP2GO because I've seen it highly recommended, but I'm curious what other services provide built-in functionalities for unauthenticated SMTP. Specifically, I need options that authenticate based on the sending IP instead of requiring credentials from the sending application. One challenge is that we can't use Office 365 Direct Send since we send emails to external recipients, and their sending limits are too strict even for internal emails. We're not interested in managing our own Postfix servers, either. Has anyone had experience with ZeptoMail or other alternatives?
5 Answers
Just remember, setting up a Postfix server could help avoid losing emails if your internet or cloud service goes down. It's a hassle, but it keeps emails queued until they're sent. You could also look into configuring something like Proofpoint for email security and trusted IP delivery.
I haven't had to search for alternatives since SMTP2GO works great for our needs, it's affordable too.
DuoCircle is a solid alternative if you're exploring options beyond SMTP2GO. Just so you know, we used to rely on Twilio, but had frequent outages with them, so we moved away from their services.
If you have a budget, it might be worth checking out Twilio SendGrid or Mailgun as potential options. They both offer different pros and cons, so it could help you compare them against SMTP2GO.
Interestingly, leveraging the 365 Connector can allow for anonymous sending even outside your domains. It might seem odd, but it's something to consider when managing internal email relays.
Related Questions
Can't Load PhpMyadmin On After Server Update
Redirect www to non-www in Apache Conf
How To Check If Your SSL Cert Is SHA 1
Windows TrackPad Gestures