Mail not showing new messages in inbox

Your problem, hardware or software, may not be exactly the same as that of the original poster of this older thread, and it can be very confusing for everybody if we try to answer more than one question in each thread, which can also result in you applying the wrong advice to your particular problem.

In order for us to give your problem our proper attention to try to solve it, would you kindly start your own thread, describing the trouble you are having in the fullest detail, including completing your details to show what Mac or iDevice you are using, what operating system, and what version of the application in question. Please remember to post in the forum relevant to your hardware or version of OS X. A full list of all the support forums is here:

http://discussions.apple.com/index.jspa

Your problem, hardware or software, may not be exactly the same as that of the original poster of this older thread, and it can be very confusing for everybody if we try to answer more than one question in each thread, which can also result in you applying the wrong advice to your particular problem.

In order for us to give your problem our proper attention to try to solve it, would you kindly start your own thread, describing the trouble you are having in the fullest detail, including completing your details to show what Mac or iDevice you are using, what operating system, and what version of the application in question. Please remember to post in the forum relevant to your hardware or version of OS X. A full list of all the support forums is here:

http://discussions.apple.com/index.jspa

Hello, thanks for the solution. It worked for me.

Same story here : a corrupted message that was perfectly legit (from our Head of IT Dpt, lol!) from a webmail point-of-view. This message made all the later messages never show in Mail.app although the activity monitor was indicating that an ever-growing number of mails were incoming.

I tried the rebuild feature, cleared the cache but only deleting the corrupted message made everything work fine again. However, I still have a popup window asking for the password of another mail box. Even if I enter the right password, it is rejected. It is not a big issue as mails from this mail box are received anyway.

Hi Klaus1, I don't get the purpose of your message: my problem IS the same that is related to the topic, I applied one of the proposed solution and it was SOLVED. I don't expect any further help from the community. I also don't understand why you had the feeling that more than one question was asked in my post: actually, there are NO question.

My goal was to thank (a lot!) the community and share what worked and what didn't work so that people having the same problem can get an answer.

Regarding the software version issue you raised, it seems that this particular problem is not specific to MacOSX 10.5 (as the original thread is related to OSX 10.5). PaulHibbert even posted a message involving a more recent MacOSX 10.11. I browsed the community forums but never found a thread as relevant as this one. That's why I did not create a new thread.

Finally, I updated my info as requested.

I am having this same problem but it is from my work email using an outlook.office365.com server, not Yahoo. Any ideas of what to do? I tried the searching for server unknown in the account info, but that does not show up. All emails show on my iPhone and iPad, just not on my mac mail. Thanks for helping!!!

I'm having the exact same problem (outlook work account), emails show in iPhone and iPad. The problem is on both my desktop (iMac) and MacBook Pro and they are running different OS's. The problem started at the same time (July 31) for both. I've tried some of the above options (rebuild mailbox, delete library file) but no luck so far. I'd love to hear possible solutions.

Even though the original post is 7 years old, this problem persists. With me, my desktop Mail works fine for awhile, then I stop getting messages through my iCloud account. No indication that new emails are waiting (like some others in this thread), it just goes silent. I get emails on my iPhone and iPad, but not on my desktop. If I quit Mail and relaunch it, emails that I missed show up, but still no new ones. The only solution that has worked has been deleting my iCloud account in SysPrefs > Accounts and re-creating it, which is a huge PITA. Sometimes, the fix holds for a few months, sometimes only a few days. #$%&#*!!!

I am having the same problem after upgrading to 10.13.2. Two interesting twists to this: 1 is that the headers of the e-mails show up, but not the body. They *do* show up if I create PDF of the e-mail and open that. Second, when I tried to follow advice to replace my com.apple.mail.plist it was nowhere to be found, not even in a Spotlight Search. Any ideas?