/Managing Your Account

IP addresses and ports

If your corporate network blocks unknown IP addresses or port numbers, this page explains what you’ll need to configure in order for Mailosaur to work.

Overview

Some organisations operate security policies that deny outbound traffic by default. If your organisation does this, you’ll need to add Mailosaur’s services to your allowlist.

We may change to our IP addresses from time to time, and so we recommend allowing by domain name rather than IP address whereever possible.

Domains and IP addresses

Mailosaur is accessible via three primary IP addresses: 34.149.187.159, 35.187.177.145 and 35.233.95.121:

SERVICE DOMAIN NAME IP ADDRESS
Website mailosaur.com 34.149.187.159
Dashboard mailosaur.com 34.149.187.159
API mailosaur.com 34.149.187.159
SMTP mailosaur.net 35.187.177.145
POP3 mailosaur.net 35.187.177.145
SMTP (Legacy) mailosaur.io 35.233.95.121
POP3 (Legacy) mailosaur.io 35.233.95.121

Note that the Legacy SMTP & POP3 services only apply to customers connecting to mailosaur.io in their test code.

Port numbers

For services to function, you must allow the following TCP ports:

SERVICE PORT NUMBER(S)
Website, Dashboard, API 443
SMTP 25, 2525, 465 and 587
POP3 110 and 995