fetchmail, openssl and a sudden failure to authenticate certificates

Since around the beginning of December 2017, fetchmail stopped retrieving mails form Gmail servers silently, without issuing any kind of error message. Only when starting fetchmail in the foreground, I got fetchmail: Server certificate verification error: unable to get local issuer certificate fetchmail: This means that the root signing certificate (issued for /C=US/O=Google Trust Services/CN=Google [...]

Outgoing SMTP mail servers considerations

Mail with gmail.com as From address vanishing It started really bad: Someone asked me why he hasn’t received an answer from me in two weeks, and I had answered his mail the same day I got his. It turned out that Gmail had thrown mail into the black hole without any warning. Probably the updated [...]

Using a shell account as a manual sendmail relay

So the situation is like this: An email I attempted to send got rejected by the recipient’s mail server because my ISP (Netvision) has a poor spam reputation. And it so happens that I have a shell account (with root, possibly) on a server with an excellent reputation. So how do I use this advantage? [...]

Plain-text mail from Thunderbird (under Linux)

Introduction I’ve been annoyed for quite a while by Thunderbird’s strong inclination towards HTML mail. To the extent that if I don’t really, really verify that a mail goes out in plain text, it’s probably going to slip out in HTML. This is bad in particular when sending mails to Linux-related mailing lists. They don’t [...]

A perl script sending mails for testing a mail server

Just set up your mail server? Congratulations! Now you should test it. In particular, check if it relays mails to other servers and if the response time is reasonable. Here’s a script for doing the testing. Just edit the arguments to send_mail() to match your setting. #!/usr/bin/perl use warnings; use strict; use Net::SMTP; send_mail(’127.0.0.1′, # [...]

Setting up a VPS server. It was a bumpy road.

Introduction These are my own notes as I set up an OpenVZ VPS server, based upon CentOS 5.6 to function as a web and mailing list server. A $36/year 128 MB RAM machine was good enough for this. Since there’s some criticism about the hosting provider, and it looks like they’re OK after all, I’m [...]

Thunderbird: Making a folder with new messages stand out

On Thunderbird 3.0.7, this little extra file turned the folder names with new mail red and bold: (the “chrome” directory needs to be created) $ cat ~/.thunderbird/sdf2k45i.default/chrome/userChrome.css @namespace url(“http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul”); /* set default namespace to XUL */ /* Setting the color of folders containing new messages to red */ treechildren::-moz-tree-cell-text(folderNameCol, newMessages-true) { font-weight: bold; color: red [...]

Gnome: An icon in the system tray (new mail)

This should have been obvious: Have a “new mail” icon in the system tray when new mail is fetched by Thunderbird on a FC12 Linux machine. I ended up writing my own script. My starting point was the “Gnome Integration” add-on. Not that I liked that it forced me to have another notification popup on [...]