Is it possible to change your email address?

I've done it, it wasn't much of a problem for me. I think it's better not to treat it as a chore you do all at once, but rather a rolling process. I updated my email address at various websites over the course of maybe two years, with the commonly-used sites all getting updated within the first couple of days, and stragglers being changed over thereafter.

Don't update te email address unless its an important account that you want to receive messages from or might need to change the password and receive the email. Often the email address had turned into a login name. The only thing you need to to is register this login name with the password. Its best to use the https://agilebits.com/onepassword for that. Email is the most common unique identifier of an individual, surpassing the more traditional means of identity like Social Security Number or Driver’s License. Email is central to everything you do online. It’s the starting point for every online account that you create. Doing so you will create a very detailed image about you, your interest, past, present and future intentions. You might want to confuse the trackers and use various email addresses. Preferably those that http://10minutemail.com/10MinuteMail/index.html

With a Lastpass database and access to the old email, this is super simple. Your choice really is to invest heavily one day in changing everything you can or doing it incrementally as you log in to each site. I preferred the former solely because I like tasks being complete. The biggest problem I had having done this a while ago was getting folks (particularly family and those not technically inclined) who use auto-complete address books to change over. This mostly just took enough time for their most frequent address to be the preferred one on their machine. With infinitely available forwarding, this is mostly an annoyance that just eventually goes away.

I changed emails 5 years ago and still come across an account with that old email, or someone mentions that they sent me an email and when I tell them I never got it we figure out they sent it to the old address. If you do this, set up autoreply on your old account to let people know about your new address. And for a while you might want to check it occasionally to make sure no important messages are getting by you or set it up to auto-forward (but part of the reason I abandoned the old account was because the spam filter sucked so YMMV).

My company is just going through a domain change, and we use a lot of cloud services. Some were easy to change over to the new e-mail addresses, but others are much more difficult. There doesn't seem to be a pattern to whether it's going to be easy or not.

When you log into a website using your email address, it doesn't check that that's your current, or active, email address. It's simply the identifier used to distinguish you from other users. So that won't break, but you should update, then, your contact info wherever you've used that old email addy.

I do this periodically as aliases I use on my domain to sign up for crap fill up with crap from people who have bought the address. It's not that bad. As others have said above, do it as you go both in logging in and as you receive an email from an entity for whom you need to log in. It's really not that bad. Occasionally (5 years after last switch?) I can't log in in somewhere and realize it's under the old alias and boom, log in that way.

I just did this in late 2013 as I was moving to a new house and my previous 14 year-old account with Comcast was no longer going to be available. It was an amazing pain in the ass and I wish I'd switched to one of the "free" services (e.g., Gmail) or my own email server sooner. I only thank my stars that I'd been keeping track of all my login credentials with Keepass, so I had a record of most accounts I had. Even then, there were some websites that didn't let me change my credentials, so I'm still logging in to those with my old email address, even though the contact email for those accounts points to my new one. And I know there were accounts I probably missed that I can no longer log into, since the backup email address is my now lost Comcast address. Given how time consuming the switchover was, I don't think I'll ever change my main email address again.

Do you save your passwords in https://support.google.com/chrome/answer/95606?hl=en or https://support.mozilla.org/en-US/kb/password-manager-remember-delete-change-passwords? Because both have built-in password management pages that show a list of all your login details by site. I used both recently to update an old throwaway password that had been cracked, and they were great help in tracking down even years-old accounts.