New SMTP2GO Inbound IP Addresses

Charlie Abrahamson
Charlie Abrahamson CEO

This is a post for current members and will be of interest to you if you have a firewall that is currently only allowing outbound connections to particular IP addresses.

In other words, your firewall is restricting all outbound connections except certain IP addresses that you have specified.

To get technical, we are adding new IP addresses to the DNS ‘A record’ for our SMTP service.

Like almost all of our members, if you don’t have a firewall that blocks most outgoing IP addresses, you won’t need to make any adjustments.

You will find the ranges of IPs here.

Note: the ranges are given in CIDR format. If you need the individual IP addresses, you can convert each range using this website.

We’re making these changes to offer greater reliability in the event of any issues with any one server or location. The changes will be made in the next 48 hours.

Originally published August 24, 2015

Charlie Abrahamson
Written by Charlie Abrahamson
CEO at SMTP2GO https://www.linkedin.com/in/charlie-abrahamson-63a59a5/

Charlie is CEO and co-founder of SMTP2GO. He started the company in 2006 after a trip to Argentina left him locked out of his own email (every internet café and local ISP blocked his attempts to send). Twenty years later, SMTP2GO delivers email for businesses around the world from its Christchurch, New Zealand base. Charlie has personally configured SMTP relays, debugged deliverability incidents, and led migrations for senders ranging from small businesses to enterprises moving off AWS SES, SendGrid, Mailgun, and Postmark. SMTP2GO is ISO 27001 certified, GDPR compliant and an M3AAWG member.

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