Maximum MX records and UDP

Today I have received an interesting question.  Coming from an Exchange background I thought it might be a Lotus specific item and of course stated I had no answer to this question.

Now, that said let’s see some of your thoughts on this question:

“What is the maximum number of MX records you can have?”

Here is my thought on this:
Honestly there is a theoretical limit of 10 in IPv4 and a payload of 65507 bytes where IPv6 is 65527 bytes.  Anything larger results in IP fragmentation; definitely bad for email.  That said why would you do more than 4-5 MX records to begin with?  That is a theoretical limit, not an actual published limit.

It has definitely lead to many internal interesting discussions today with several other engineers.

Batter up!!

15 Comments


  1. christian louboutin asteroid

    Brown Leather-based Christian Louboutin Orniron 100mm Ankle Boots available to getting a worth-buying product or service of less costly Christian Louboutin athletic shoes. You are worthy of to very own this long-lasting Christian Louboutin Ankle Shoes or boots fashion on this occasion. It is usually rather a breeze to pair with day-to-day attire all year extended. You may enjoy the matching color plus style a good deal! Hurry just about obtain and also acquire no cost shipping


  2. ralph lauren outlet

    Thanks sharing with us exceptional informations. Your websites are awesome. I?ˉm pleasantly surprised about the important points you carry with this particular web. The situation displays in which way good you’re confident such a subject. Bookmarked such a landing page, will return for more reviews. You really, my best mate, Hard rock! Go here for this is the details I really already scoured everywhere you go and just couldn’t run across. Precisely gorgeous place.


  3. ニュース

    How can I insert a tag cloud into my blog @ blogspot? I try using the gadget options but I can’t find a 3rd party one listed. Can someone please show we where to get one and how to install it?.


  4. christian louboutins pumps

    Things because Christian Louboutin invited many street artists to be involved in the great event on the year, also draw on the outdoors wall of the senior citizen department store Neiman Marcus manufacturer graffiti street artist Galo Canote.



  5. Longchamp outlet

    The Longchamp taschen sale of Longchamp taschen counterfeit bags is illegal. The Longchamp taschen sale of Longchamp taschen knock-off products is not illegal and any replica Longchamp taschen bag that is made to look like the gestalter bags without counterfeiting the gestalter replica Longchamp taschen handbags. you have the look you want and a Longchamp taschen price you can live with. Replica Longchamp taschen bags today are very high quality and can fool even the most proficient expert.


  6. pink beats by dre

    Be a words of section chief Xun, the next training is to armed to the teeth, the result doesn’t say that attaining is excellent, good of however several people of Liao Liao, majority of the roots disqualified.


  7. I don’t even understand how I finished up here, but I believed tuis submit was
    once good. I don’t recognise who yyou are however certainly you are going to a famous blogger
    in case you aren’t already. Cheers!


  8. Howdy! Do you use Twitter? I’d like to follow you if that would be ok.
    I’m absolutely enjoying your blog and look forward to new posts.

Comments are closed.