High IMAP bandwith usage
One user's mail account has used 300+GB data in a month. The mailbox is 5GB, they don't receive that many emails. What can cause this excessive usage and how can I stop it, other than suspend the account?
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Is php mail function on the server? also are you sure all this data is used by emails only? 0 -
Hello, Here's a recent thread you may find helpful: IMAP consuming so much bandwidth Thank you. 0 -
I have not been able to stop the excessive IMAP bandwidth behaviour. The option to suspend the account doesn't work for IMAP. It only suspends the hosting on the account, and not the IMAP traffic. WHM shows the account as "Suspended", however IMAP is not suspended and eats traffic. How can I also suspend IMAP traffic once over quota? The single mail account has used 500+GB of traffic this month (1 user on a 5GB mailbox). 0 -
We've experienced the same issue with IMAP consuming a relatively large amount of bandwidth. For example, 1 user with a 500MB mailbox consumed 50GB in a month, with 10GB in one day alone. We ran the grep command below @cPanelMichael suggested in the linked post to investigate. grep domain.com /var/log/maillog
The logs show a large number of UID SEARCH commands which, in our case, are the main cause of the usage. For example, the below single UID SEARCH command resulted in 367MB of data sent to the user.Connection closed (UID SEARCH finished 10.661 secs ago) in=1410, out=367464470, bytes=1410/367464470
These quickly add up. The logs show this user issued 113 UID SEARCH commands in a single day, which explains the 10GB in a day bandwidth. I'm guessing this is a body search from a device or app which does not store email. E.g. iPhone. @cPanelMichael We're not running Solr on this server. Would installing it help mitigate this? Clearly there is a waste of resources and I'm certain the user would prefer to not use all their cellular data searching email.0 -
The option to suspend the account doesn't work for IMAP. It only suspends the hosting on the account, and not the IMAP traffic. WHM shows the account as "Suspended", however IMAP is not suspended and eats traffic. How can I also suspend IMAP traffic once over quota?
The bandwidth limiting feature only limits access to the account over Apache. This is documented at: Account Suspension Versus Bandwidth Limiting and Account Termination - cPanel Knowledge Base - cPanel Documentation Here's the quote: The system only imposes bandwidth limiting on an account's Apache services. Users can still access FTP, Mail, and DAV services, even if their account exceeds the monthly bandwidth limit.
You'd need to either suspend the account using "WHM >> Manage Account Suspension" or use the > Manage Plugins" helps. Thank you.0 -
Solr is already installed on my server with the high bandwidth usage. 0 -
Solr is already installed on my server with the high bandwidth usage.
The reference to Solr was a response to the other poster. Were you able to review the linked threads within the thread I referenced earlier? IMAP consuming so much bandwidth Thank you.0 -
Yes, I have identified the account and IP address that use the bandwidth. However I don't know how to solve the issue, other than to deactivate the account. The user is running outlook as well as using an iPhone on this account. If the issue is caused by some incompatibility issue with outlook or iPhone and cPanel/IMAP then I would think there should be many people affected by this. 0 -
Yes, I have identified the account and IP address that use the bandwidth. However I don't know how to solve the issue, other than to deactivate the account.
Feel free to open a support ticket using the link in my signature if you'd like us to take a closer look to rule out any issues with the mail server configuration. Thank you.0 -
Just had the same problem when looking at the bandwidth logs. Tried a lot, but as it seems now it's fixed by login in to the WHM and repair the mailbox permissions. After this repair (there where some mailboxes that needed a repair) my imap traffic is back to normal 0 -
This issue was happening to me, it seemed to happen with only one user and after troubleshooting I realised it was their antivirus on their PC (AVG Antivirus more speficially) causing issues. The Mail protection on AVG meant it was continuously syncronising with IMAP, ended up using almost 200GB of data over 2 days. I told the client to delete AVG or disable the mail scanning functionality which fixed the issue. 0 -
Hi mrdigitalau! I'm glad to hear that you were able to resolve the issue! nick122147 does your client happen to have a similar antivirus installed on their machine perhaps? If not, I think it would be best to open a support ticket so that our analysts can review the issue more thoroughly and determine what exactly is occurring. You can submit a support request using the "Submit a ticket" link in my signature below. Please be sure to link this thread when opening the ticket and provide the ticket number here so that we can track the issue appropriately. If possible, please post the resolution on this thread as it may help other community members with similar issues. 0
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