Category Archives: Technical
Block login attacks with abuseIPDB
VPOP3 will automatically block IP addresses which repeatedly try to log in with an incorrect username or password. However, to prevent blocking users who accidentally enter the wrong details for too long, this usually just blocks the IP address for a few minutes (the default is 30 minutes). There is an online database at https://www.abuseipdb.com/ […]
Read More...Homeworking with VPOP3
In these troubled times, many of you will be working from home, or thinking about working from home. This article is intended to help you out in that situation. Email Forwarding – not the best way A common request is how to forward email to personal email addresses to allow home working. While that may […]
Read More...DMARC
VPOP3 v7.8 adds DMARC checking support, so this post is to give you more information about DMARC. Note that to have VPOP3 check incoming messages using DMARC, it must receive messages using direct incoming SMTP (not via a third party’s SMTP server, and not from a POP3 mailbox) and you must have either VPOP3 Enterprise or […]
Read More...Duplicate messages in Outlook 2016 when using POP3
There was an update to Outlook 2016 in February 2016 which appears to have caused a problem where it will repeatedly download messages from the POP3 mailserver. This is NOT a problem with VPOP3, and there is nothing that VPOP3 can do about the problem. See this link for more information: http://www.howto-outlook.com/news/outlook-2016-pop3-duplicates-february-2016.htm In summary, some […]
Read More...What to do about .DOC / .XLS malware emails
There are currently large amounts of ‘spam’ emails being sent containing .DOC and .XLS files. These files are sometimes almost benign just containing a spam message, but often contain macros which can do malicious things, such as downloading viruses from the Internet when the files are opened. These files seem to be very difficult for virus scanners […]
Read More...Advanced Autoresponders in VPOP3
Autoresponders (or ‘Out of office replies’) are supported by VPOP3. This article explains some of the advanced features of VPOP3’s autoresponders. Autoresponders can be set by administrators by editing the user in the settings, and going to the Autoresponder tab, or by the user themselves by logging into their VPOP3 Webmail account and going to Tools -> Autoresponder. […]
Read More...Background log writer
The diagnostic log files which VPOP3 generates can add a lot of extra disk load to a VPOP3 server. For this reason, VPOP3 doesn’t usually write data to the log files as soon as the event happens. The log file entries are held in memory until the “background log file writer” gets around to it, […]
Read More...Free Webinars / online training
We are planning on holding some Webinars /online training events for VPOP3 users and partners. These will be free, but availability is limited. The initial planned dates are: Friday 29th August 3.00pm – 4.00pm – beginners (registration) Friday 12th September 3.00pm – 4.00pm – advanced usage (registration) Friday 19th September 3.00pm – 4.00pm – beginners (The above times are […]
Read More...Heartbleed bug
As you may have seen in the news, a vulnerability in recent versions of OpenSSL has been found. Current versions of VPOP3 are released with OpenSSL 1.0.1e which does have this vulnerability. The next version of VPOP3 will be released with OpenSSL 1.0.1g which has been patched. Older versions of VPOP3 (v6.2 and earlier) used […]
Read More...VPOP3 64 bit version – progress
For a few years we have wanted to make a 64 bit version of VPOP3. This should have immediate performance benefits when there are large numbers of users, and will allow us to add more performance improvements later, such as caching IMAP4 mailbox folder contents etc. For the past year or so we have been […]
Read More...