Very slow IMAP

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TermiTV
Posts: 1
Joined: Mon Jan 20, 2020 2:10 pm

Very slow IMAP

Post by TermiTV » Mon Jan 20, 2020 2:18 pm

Hello,

i am on Version 10.27 on Windows Server 2016 x64 and IMAP is very slow. It takes 30-60 seconds to update my IMAP on iOS, Android and Outlook (W10). Webmail is working just fine. Any Ideas on how to fix this? Maybe allocate some more ressources for IMAP?

Greetings
Martin

MailEnable-Ian
Site Admin
Posts: 9227
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Very slow IMAP

Post by MailEnable-Ian » Thu Jan 23, 2020 12:24 am

Hi,

First step is to download 10.29 and upgrade MailEnable as it contains fixes you need to apply to core services in particular the IMAP service.
Regards,

Ian Margarone
MailEnable Support

malikguy
Posts: 7
Joined: Thu Sep 17, 2015 5:48 pm

Re: Very slow IMAP

Post by malikguy » Sun Aug 02, 2020 9:16 am

Hello Ian, we are on ME 10.30 Pro and are still seeing very poor IMAP performance specifically on larger mailboxes. One of our iPhone users states that it can take up to 2-3 mins to refresh his inbox. Can you provide any guidance?

MailEnable-Ian
Site Admin
Posts: 9227
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Very slow IMAP

Post by MailEnable-Ian » Sun Aug 02, 2020 11:15 pm

Hi,

We would need access to log files and the server to troubleshoot in more detail (you will need to lodge a support ticket for this). If you have AV software on the client machine then try to disable the email filtering in the AV app. Try another IMAP email client.
Regards,

Ian Margarone
MailEnable Support

MartynK
Posts: 1364
Joined: Sat Dec 28, 2002 1:12 am
Location: Hong Kong

Re: Very slow IMAP

Post by MartynK » Sat Aug 15, 2020 2:46 am

I am still seeing the same issues with IMAP being very slow in on large mailboxes.

I have a number of client installs setup with and without AV installed and it does not seem to make much difference.

The one thing I have found is the more email changes it needs to resolve, the slower it gets and the more likely to freeze.

MartynK
Posts: 1364
Joined: Sat Dec 28, 2002 1:12 am
Location: Hong Kong

Re: Very slow IMAP

Post by MartynK » Sun Aug 23, 2020 1:18 am

Have you got anywhere with this, I am still having trouble and testing all sorts to try to get to the bottom of it.

MailEnable-Ian
Site Admin
Posts: 9227
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Very slow IMAP

Post by MailEnable-Ian » Mon Aug 24, 2020 3:28 am

Hi Martyn,

Might be best replying to your open ticket for more information. Did the client we were testing complete the sync? If so did it exhibit the same behavior so we can check it again?
Regards,

Ian Margarone
MailEnable Support

MartynK
Posts: 1364
Joined: Sat Dec 28, 2002 1:12 am
Location: Hong Kong

Re: Very slow IMAP

Post by MartynK » Mon Aug 24, 2020 3:41 am

Ian, I will reply to my ticket, just asking if the other person got anywhere.

I need to get time to go run my tests, everything is ready now, just need to get away from work.

MailEnable-Ian
Site Admin
Posts: 9227
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Very slow IMAP

Post by MailEnable-Ian » Mon Aug 24, 2020 4:39 am

Hi,
Ian, I will reply to my ticket, just asking if the other person got anywhere.

I need to get time to go run my tests, everything is ready now, just need to get away from work.
Ok great. Let us know.
Regards,

Ian Margarone
MailEnable Support

dcol
Posts: 103
Joined: Fri May 26, 2017 11:25 pm

Re: Very slow IMAP

Post by dcol » Wed Sep 09, 2020 4:55 am

On version 10.31 and IMAP in Outlook is very slow. Doing one user now with 30,000 emails in their postoffice. It will probably take more than 24 hours to complete. coming in at the rate of 50-60 per minute.

Any solution to this yet?

MartynK
Posts: 1364
Joined: Sat Dec 28, 2002 1:12 am
Location: Hong Kong

Re: Very slow IMAP

Post by MartynK » Wed Sep 09, 2020 7:44 am

Whats the ping time between your client and email server ?

dcol
Posts: 103
Joined: Fri May 26, 2017 11:25 pm

Re: Very slow IMAP

Post by dcol » Wed Sep 09, 2020 2:44 pm

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 35ms, Maximum = 50ms, Average = 40ms

dcol
Posts: 103
Joined: Fri May 26, 2017 11:25 pm

Re: Very slow IMAP

Post by dcol » Wed Sep 09, 2020 3:13 pm

More info.
Tried Outlook on a computer on the local network. Also snail speed.

dcol
Posts: 103
Joined: Fri May 26, 2017 11:25 pm

Re: Very slow IMAP

Post by dcol » Mon Sep 21, 2020 10:01 pm

Anyone? Thunderbird and webmail works fine. Outlook is slow. My customers need outlook because of their calendars and personal folders.

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