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In case you should need the Messagelabs IP’s to permit inbound traffic in firewall rules, an up-to-date list is below:


Subnet IP Subnet mask Net mask IP Range /24 – /19 – /19 – /19 – /20 – /20 – /21 – /21 – /21 – /23 – /23 – /23 –

Hope this is useful to someone :)

One Comment

  1. Not sure if this is going to get to the right parties…but in case it does….here goes…..I work for an execuitive search firm in NYC and I have a client in midtown who is looking to hire – fulltime – a senior Red Hat Administrator. If interested in learning more send me a note – – and I will send you a full job description for your perusal. Thanks, Steven

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