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Standard User Rygar1
(experienced) Thu 13-Jun-13 17:10:44
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Upload speed for mail server


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Generally speaking what sort of upload speed would a company with around 50 users need to run their own in house mail server? Serving a remote office and maybe 6 home workers. Just average day to day office stuff with attachments upto 10 meg from time to time.
Administrator MrSaffron
(staff) Fri 14-Jun-13 09:30:51
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Re: Upload speed for mail server


[re: Rygar1] [link to this post]
 
10Meg time to time, if that means just once a day, and maybe 500 incoming emails and 100 outgoing, then no reason an ADSL2+ line would not serve needs if using an external mail server.

If business wants to run in house mail server, then if the backup MX is off-site ADSL2+ might be ok still, but if not then you might want to look at specific business connections like Leased Line/Ethernet which have better availability and thus less likely to be glitches causing lost business.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Rygar1
(experienced) Fri 14-Jun-13 09:51:21
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Re: Upload speed for mail server


[re: MrSaffron] [link to this post]
 
Probably more like 2500 in and 1000 out per day. The 10 meg attachments maybe 4 per user per day.


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Administrator MrSaffron
(staff) Fri 14-Jun-13 10:39:55
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Re: Upload speed for mail server


[re: Rygar1] [link to this post]
 
Still fairly small, as would be around 100MB for 2500 emails.

It is less about the speed of the connection, but more the reliability and how you would cope if the connection did break.

So size wise ADSL2+ with uploads up to 1 Mbps would wise, just ensuring backups in place to handle if/when the line breaks. Or whether you should host the mail server in the business premises or elsewhere.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Rygar1
(experienced) Fri 14-Jun-13 11:33:28
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Re: Upload speed for mail server


[re: MrSaffron] [link to this post]
 
OK thanks. Reason I ask is I'm one of the remote users. Attachments now download at around 40 KB/s whereas they used to download at close to full speed, so around 400KB/s. Feels like a step backwards.
Standard User ian72
(knowledge is power) Fri 14-Jun-13 12:02:50
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Re: Upload speed for mail server


[re: Rygar1] [link to this post]
 
It depends then as well on what else is on that connection. The mail server is likely only one item - if there are other data transfers going on then that would slow the line. It could be that it is being used to do cloud backups and so using upstream to backup servers? You would need to know exactly what else is happening on that connection.
Standard User Rygar1
(experienced) Fri 14-Jun-13 12:44:57
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Re: Upload speed for mail server


[re: ian72] [link to this post]
 
That I'm not sure about, I'd need to do some more digging. I do know they are about 1 mile away from a small exchange with no LLU or 21CN so I assume no ADSL2+ access. So probably just the standard office upload speed of what? 600K after overheads? I've lost track of what those products are capable of as haven't used myself for years.

There's definitely no leased line etc.
Standard User ian72
(knowledge is power) Fri 14-Jun-13 13:15:50
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Re: Upload speed for mail server


[re: Rygar1] [link to this post]
 
Personally I don't rate standard ADSL upstream as being capable of supporting a business connection if the business is locally hosting things like mail servers. We have major performance issues on ADSL with offices of just 10 people or even less where we aren't locally hosting - add in the server traffic and you are stretching the capabilities of such a low upstream.

But then how were you ever getting 400KB/s? Is this just a mix up with capital / lowercase B? If you are retrieving I would expect to to be in kilobytes per second in which case an office ADSL product would be 800Kbit/s (ish) which would be 100KBytes/s.

Is this just a mixing of bits and bytes. The 400Kb/s you used to get would translate to around 50KB/s - not far off what you are saying. Need to just check you are using the right units otherwise it could just be you are getting the same speed now as before. And if it was 400Kbit/s then they could be the upload on a standard ADSL as that is what normal ADSL (non-business upstream) would be.
Standard User Rygar1
(experienced) Fri 14-Jun-13 13:34:16
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Re: Upload speed for mail server


[re: ian72] [link to this post]
 
In reply to a post by ian72:
But then how were you ever getting 400KB/s? Is this just a mix up with capital / lowercase B? If you are retrieving I would expect to to be in kilobytes per second in which case an office ADSL product would be 800Kbit/s (ish) which would be 100KBytes/s.

Previously we just used 1and1, so got close to full downstream speed from their servers. 4Mb/8=500KB less 20% overheads = 400KB/s.
Standard User ian72
(knowledge is power) Fri 14-Jun-13 15:10:31
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Re: Upload speed for mail server


[re: Rygar1] [link to this post]
 
So they have moved from a hosted mail solution to a local server? In which case the server has gone from probably a gigabit leased line connection to an ADSL connection with potentially 400Kbit/s upstream - so you would expect to see that change in download rates.

Personally I would not have hosted a mail server for a company of that many employees on an ADSL line.
Standard User Rygar1
(experienced) Fri 14-Jun-13 17:32:00
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Re: Upload speed for mail server


[re: ian72] [link to this post]
 
Yup. Seems crazy to me but then I dont know much about in-house mail servers and their benefits. I guess more control etc but it seems no one really considered the remote users. The majority of users are in the same building as the server so I guess they'll be OK.

So back to my original question, as just looking for a few opinions from people more in the know than me...what upload speed would you think a local mail server would need for the usage I have described? My uneducated gut feeling was around 2Mb minimum.

Edited by Rygar1 (Fri 14-Jun-13 17:35:56)

Administrator MrSaffron
(staff) Fri 14-Jun-13 18:10:04
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Re: Upload speed for mail server


[re: Rygar1] [link to this post]
 
The joy of virtual servers means you can remote admin a server as well remotely in a data centre as a you can in an office.

if anything the virtual server is easier as can be potentially accessed by people to configure it from anywhere.

I would be asking as the next question, what is their backup MX configured like, i.e. if the phone line breaks and ADSL is down, is there a backup where mail is queued.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Rygar1
(experienced) Fri 14-Jun-13 18:36:40
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Re: Upload speed for mail server


[re: MrSaffron] [link to this post]
 
I would hope that has been considered & addressed as it was an external IT company that came in to do all this, but I'm not privy to all the details so I don't really know. I'm really just trying to do some research to see if there are reasonable grounds for myself and other remote users to 'opt out' of being channelled via the company server, if thats even possible. Some days I get no big attachments but other days I might get 40MB worth in one go. So by my calculations thats a 15 to 20 minute wait vs 1.5 to 2 minutes as it was before.

I guess fibre will solve the problem within the next few years but until then I foresee some frustrating times ahead.
Administrator MrSaffron
(staff) Fri 14-Jun-13 19:31:59
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Re: Upload speed for mail server


[re: Rygar1] [link to this post]
 
If this is the result of recommendation by an external firm, then I would be getting worried at this point in time.

It may be they did not consider the needs of the remote out of office staff who would be constrained by the upload.

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Rygar1
(experienced) Fri 14-Jun-13 19:49:28
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Re: Upload speed for mail server


[re: MrSaffron] [link to this post]
 
Yes, this is my concern. The worrying part is that I brought up the issue of upload speed with this external firm and they seemed quite dismissive as if it wasn't really a problem. I'll freely admit I know next to nothing about web & mail servers, but even I know upload speed & reliability is a very important factor when running your own servers.

Edited by Rygar1 (Fri 14-Jun-13 19:53:35)

Standard User ian72
(knowledge is power) Mon 17-Jun-13 10:24:07
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Re: Upload speed for mail server


[re: Rygar1] [link to this post]
 
For the sort of usage you have specified I would personally recommend a minimum 10Mb upload (probably look at a 10Mb symmetric line). The problem is that if large attachments are being sent via the mail server or opened by remote users then it all happens over that crummy little upstream. And all the time the mailserver is sending your 40MB document to you the line will be virtually unusable for those people who work in the office as the upstream will be swamped.
Standard User Rygar1
(experienced) Mon 17-Jun-13 22:59:43
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Re: Upload speed for mail server


[re: ian72] [link to this post]
 
Thanks to both yourself & Andrew for the advice. Has given some food for thought.
Standard User ian72
(knowledge is power) Tue 18-Jun-13 08:28:43
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Re: Upload speed for mail server


[re: Rygar1] [link to this post]
 
The only other thing I would add is that email probably isn't the best medium for 40MB attachments. Many companies block attachments much smaller than that (even as low as 5MB).

Some sort of dropbox of Secure FTP service would be preferable to using email for this volume of data.
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