OS X 10.7 Lion to OS X 10.10 Yosemite users need to go to /Library/Mail/V2/MailData and do the same thing. Remember that the Library folder is hidden in El Capitan so you need to go to Finder (the smiley Mac icon in the far left corner of your Dock for those new to Macs) and select “Go” and then hold down the “Alt” key and the Library folder will appear.

When you next open Apple Mail, it will automatically rebuild and should work fine again. To fix this, El Capitan users should go to the location /Users//Library/ Mail/V3/MailData/ Envelope and delete the “Envelope” file. However, sometimes during the upgrade to El Capitan, the V2 and V3 folders get mixed up causing problems. In OS X 10.11 El Capitan onwards, Mail is stored in User’s Library > Mail > V3 folder. In OS X 10.7 (Lion) to OS X 10.10 Mavericks, Mail is stored in the User’s Library > Mail > V2 folder.

Note: We recommend backing up or copying the “Mail” folder to your desktop before deleting or making sure you have a Time Machine backup just in case anything goes wrong. If you’re finding that Mail won’t stay open long enough to allow you to rebuild, make sure that Mail is closed and then just delete the Envelope files in the Library folder. The simplest solution is to try rebuilding your Mail folder. El Capitan Mail Issues: 10 Ways To Fix ThemĪpple will automatically do this for your with the Mail Settings Lookup tool. The precise cause of the problem usually depends on your specific setup but if you try going through these fixes, one of them should get mail working on El Capitan again. Mail issues are a common problem with new versions of OS X and we’ve been through this many times before so we’ve looked at the most common solutions to bugs such as Mail not opening, crashing, refusing to recognize accounts or simply freezing when opening or trying to send and receive email. However, this still hasn’t fixed the problems for many users who have coined the name “El Crapitan” for the various problems and bugs that have plagued OS X 10.11. We recommend before proceeding that you install this update first to see if it fixes Mail which you can install by going to the Mac App Store and selecting “Updates” at the top. On October 21st Apple released the El Capitan 10.11.1 update which claimed to have fixed Apple Mail problems with outgoing server issues and message display problems. There are still various El Capitan Mail issues that some people are having including mail not sending in El Capitan, mail not being received and many more frustrating bugs.

Mail mac smtp server offline