FAIL (the browser should render some flash content, not this).

E-Mail Spooling Service - What IP addresses does ETRN run monitor checks from?

What IP addresses does ETRN run monitor checks from?


The ETRN system runs monitor checks from the following host names / IP addresses: 2607:3f00:11:21::10 2605:8340:0:1::2 2604:180:1:6e::83b5 2600:3c04::f03c:92ff:fe9b:dd03 2607:fc88:100:40::2 2602:ffc5:105:408::2 2602:ffc8:1:14:225:90ff:fee6:8f90 2607:3f00:1:a::10 2a06:8640:198::2 2605:9f80:c000:127::2 2001:1828:0:f6::2 2604:bf00:214::10 2606:c700:4020:17:225:90ff:fe50:390a 2a01:4020:1:26::10 2001:bc8:2327:110::10 2001:41d0:602:4e3::10 2a02:2770:5:0:21a:4aff:fe1a:c131 2001:41d0:700:1360::10 2a01:a500:2604:10::10 2a01:4f9:2b:105::2 2404:f780:2:950:216:3cff:feb8:ab8e 2404:9400:2:0:216:3eff:fee1:bce0 2400:8901::f03c:91ff:feb9:fbf4 2403:2500:8000:1::ce6 2406:d500:9::7a91:9b75 2404:9400:4:0:216:3eff:fee1:3c1b 2604:bc80:8001:3c:225:90ff:fee5:5c6

These IP addresses can also be accessed via a DNS query to for automating your firewall rules if needed.

We Answer Your Questions: FAQ

Q: What is the maximum e-mail attachment size?

A: The e-mail servers do not limit the size of individual e-mail attachments. The e-mail servers do impose a 400 MB maximum total message size limit. Individual customers can choose a smaller message size limit. We can also customize the handling of "over-sized" e-mails. Please contact us to discuss your specific needs. A couple of important facts:

1. Attachments are typically encoded in what is called Base64[1]. As a result, the actual length of MIME-compliant Base64-encoded binary data is usually about 137% of the original file size.

2. E-mails often contain both plain text and HTML components. This also increases the overall size of the e-mail.