Posteo is a privacy and security focused email service from Germany

Unless you are making sure that you are using encryption when using email, chance is that your emails get read by machines and maybe also individuals as they are not protected by any means.
German email service Posteo just announced an addition to the service's privacy-focused email offering that allows all users to encrypt their mail data with the click of a button.
Posteo is not free but affordable at $1 per month or $12 per year. Users get 2 Gigabyte of free storage for that with options to increase storage for $0.25 per Gigabyte per month.
What sets Posteo apart from the majority of other email services out there is its focus on privacy and security.
Privacy begins when you sign up. While you can use your credit card or PayPal to subscribe, Posteo supports cash as well which ensures your anonymity. The sign-up form itself requests no personal information and Posteo promises that they don't save IP addresses and replace user IP addresses when sending emails with that of the Posteo server.
Posteo supports TLS-encrypted access and transmissions, encrypts all data on AES encrypted hard drives, and supports the previously mentioned crypto mail storage.
To use it, select Settings > Encryption from the menu, enter your account password again to verify that you have access to it and then the "activate crypto mail storage now" button.
Once you hit the button, all emails of the account are encrypted using the password. This includes not only the email body but also attachments and metadata. In addition, all future emails that arrive are encrypted as well.
Posteo notes that encryption blocks them from accessing the contents of user emails and that users will lose access to all emails if they forget the account password.
Encryption does not prevent the use of IMAP or POP3 so that you can access your account using local email programs and mobile devices.
Crypto storage is not the only protective feature that Posteo offers. Users may enable inbound encryption and end-to end encryption of individual emails using S/MIME or OpenPGP. In addition, address book and calendar can be encrypted directly on the web interface to protect the data using the account password.
Additional information about security and privacy are available on the site's encryption help page.
Posteo is a subscription-based email provider. One benefit of paying money for email is that you get an ad-free tracker-free environment. The service, including its webmail interface and newsletter, is completely ad-free and uses no tracking tools on the web either. Since it is not financed by advertising, it has no advertising partners or parses emails to deliver targeted advertisement to users of its service.
As far as additional features are concerned, you may configure aliases (two are free, more for $0.10 per alias) which you can use instead of the primary email address. Aliases support a variety of localized Posteo domains but no custom domains at the time of writing.
What else? The service ships with its own spam and virus filter, supports custom filters to sort emails by content or sender automatically, folders, a pop3 migration service to migrate from another service, forwarding and auto-reply, and support for IMAP and POP3 connections.
You may also use signatures and HTML emails, receive attachments of up to 50 Megabyte in size, or switch between different view modes for emails.
Address book and calendar support import and export operations. It is for instance possible to import CardDAV contacts to the address book or export calendar data as ics files. In fact, data exports are one of the key features of Posteo as it gives users full control over their data at any time.
POP3/IMAP information
Server name: posteo.de
Username: [email protected]
Password: Your personal password
Outgoing mail server (SMTP):
- With STARTTLS using port 587, or
- with SSL/TLS encryption using port 465
Incoming mail server (IMAP):
- With STARTTLS using port 143, or
- with SSL/TLS encryption using port 993
Incoming mail server (POP3):
- With STARTTLS using port 110, or
- with SSL/TLS encryption using port 995
Closing Words
Posteo is not free but the base service is reasonably priced at €1 per month especially if you consider that it supports anonymous payments and several options and features that protect user identities, emails and other data. All in all an interesting email service for privacy and security conscious Internet users.

You said that Outlook isn’t your main email client, so which is your main one?
I think its thunderbird
It is Mozilla Thunderbird.
Awesome! This actually solved my problem… what a stupid bug.
If this is the same bug that I’ve encountered, there may be another fix: (1) hover over open Outlook item in Taskbar, cursor up to hover over Outlook window item, and right-click; (2) this should give you Restore / Move / Size / Minimize / Maximize — choose Move or Size; (3) use your cursor keys, going arbitrarily N/S/E/W, to try to move or size the Outlook window back into view. Basically, the app behaves as though it were open in a 0x0 window, or at a location that’s offscreen, and this will frequently work to resize and/or move the window. Don’t forget to close while resized/moved, so that Outlook remembers the size/position for next time.
THANK YOU Claude!!! I could get the main window to launch but could not get any other message window to show on the desktop. You are my hero!!!!
Solved my issue! 6 years later and this is still problem…
Fantastic. Thank you. Size did the trick.
This solved my Outlook problem, too. Thank you. :)
Thank you so much, this started happening to me today and was causing big problems. You are a life saver, I hope I can help you in some way some day.
You are a god – thank you!
thanks a lot…. work like charm.. :-)
Yah…thanks Claude. I’ve been having the same problem and tried all the suggestions…your solution was the answer. It had resized itself to a 0/0 box. Cheers
Excellent post. This had me baffled even trying to accurately describe the problem. This fixed it for me.
Thank you
Thanks a lot for the article. Don’t know why it happenend, don’t know how it got fixed, but it was really annoying and now it works :-)
Thanks a lot. I was facing this issue from past 3 week. I tried everything but no resolution. The issue was happening intermittently and mainly when I was changing the display of screen ( as i use 2 monitors). The only option i had was to do system restore. But thanks to you.
I’ve been tried to sole this problem for 12hours. Your comment about changing the display of screen helped me a lot!! Thanks!!
Thank you…don’t know why this happened but your instructions helped me fix it. Running Windows 10 and office pro 2007
Great tip! Thanks!
Worked for me, too – thank you!!!
It’s Worked for me, too
thank you very much!
I had a similar issue with Outlook 2013 on Windows 10 and this helped me to fix it. Thank you very much!
Thank you so much. Solved!
Considering you published this in 2012, incredible not been debugged by Microsoft.
Thank you again. M
This problem was faced by only one user logging to TS 2008 r2 using outlook 2010.The issue was resolved.
Thanks.
Great tip. Thank you!!!! If it helps, I had to use the Control Key and the arrow keys at the same time to bring my window back into view. Worked like a charm.
Thank you, this worked !!!!
Man, you are a fucking god. Thanks a lot, what an annoying bug!!
Awesome, this post solved the issue. Many thanks!