Can't send mail after mavericks upgrade

i had same problem, on be broadband in uk, all smtp servers offline. fixed by selecting port 25 in custom, not just default ports even though they include 25

Same problem here.. I use Apple Mail for my Gmail and I do receive all incoming mails, but can't send any mails. Mail gives an errormessage which talking about "authentication required".

Message is in Dutch but the response is in English..

Really... i tried everything... App specific passwords, deleted and reinstalled my accounts, different ports, ssl,...WHAT THE **** is GOING ON?

I tried Airmail and everthing is just working fine... ***? So i can handle my mail, but I hate to lose all my settings, folders and rules in Apple Mail... 😟

Any suggestions?

Same here... so depressing, wish I did not upgrade!

It seems to be a problem with the Google SMTP server. I just used a different SMTP server for my GMail, the smtp server of XS4ALL (dutch Telecom Provider) and now it works just fine and sends the mail with no problem.

In the early years you can only used the smtp of your TP at home, but i just heared i can use the XS4ALL SMTP anywhere i want.

So I found a work-around this way, but it still ***** the GMail SMTP gives so much problems.

same problem for me: I have 2 (university based) SMTP servers

I can receive mail but "authentification failed" for sending mail.

This is critical ... and nothing seems to work.

my message to my university lab : do not upgrade to Maverick!

my message to Apple: do something quickly please!

I've reset all the passwords and the connection doctor tells me that I'm connecting to all the appropriate servers but still can't send mail.

Have tried all the fixes above but am no closer to a solution.

Not only that but my entire list of Sent mails has disappeared. I'm in email ****!

Do you guys have problems with all SMTP servers? Because at this moment i only have problems with the SMTP server for Gmai.

I have problems with all servers but have disconnected Gmail anyway.

Though I don't know what SMTP means, I think it must be a problem with the SMTP servers, from what I am reading. I have two Gmail accounts – one through my university, and one Google. After some work, I managed to get the university Gmail to kind of work. When I first opened mail it syncs with the server, syncing all folders and files with that university account. I can also mail out of that account. However, after the initial contact of the server, the account will no longer download emails, worsening folders of emails that have changed on the server. To download new emails, or to sync folders with the server, I must quit Mail, and relaunch. As for the Gmail account (non-university) nothing will make it work. I have tried every fix that I have read online, I have tried every combination of SMTP server and porch that I can see, I have tried every permutation of my email address — with@gmail.com and without — and nothing will work. It is simply dead in the water.

Interestingly enough, on my iOS devices all of my accounts work fine in without any problem. Perhaps OS X needs to become even more like iOS?

yes to all SMTP servers (no Gmail)

what I was obliged to do is this: the SMTP server from the university where I reside accept connections without a password from IP addresses inside the local network. So getting rid of the password thus enables me to send mail. But If I connect outside this network I am %@&#!!!

So it is an authentification snag.

(connecting to mail from the console through telnet did work!)

I was having the same SMTP problem with my email server. I quit Mail, opened Keychain Access, went to Certificates and deleted my email host's certificates. When I relauched Mail the app asked me to confirm the certificates for my email host. Mail seems to be working for me right now.

SMTP is the protocol used for sending email.

http://en.wikipedia.org/wiki/Simple_Mail_Transfer_Protocol

No problems with iOS neither. I think Apple Mail for OSX handles Gmail differenly.

Disable SSL is not a solution. I have SSL enabled because i want my SMTP secured. I will not disable it.

I think one of the solution for the moment is to install a local SMTP server on your mac (or VM) and access it by 127.0.0.1, without security...

Edit: I fixed some SMTP connections by deleting all servers and the Mail.app preferences, then by reconfiguring them. It's now OK for all my GMail, but not for my own SMTP.

I have all the above problems and tried every possible fix since upgrading to Mavericks, my emails will not send as SMTP server shows 'offline' but ONLY through WIFI. However, it works perfectly if I connect the ethernet cable. All my iphones, ipad etc work perfectly but both mac mini's have exactly the same problem since the upgrade. I have wasted days on trying to fix it and have given up until Apple come up with a solution. Not happy!!

I've given up with Apple Mail and am using Airmail until this is fixed.

One interesting point: Airmail wouldn't allow me to use an alias address (possibly to disalow spamming, although mine was benign) and crashed the program which I had to reinstall. On the offchance that Apple was using the same policy, I closed the alias account and reinstalled Mavericks (for the 3rd time!) But still no result.

I'm completely mystified and not very happy as now I have systems which conflict so that I'm much worse off with Mavericks and can't share new iWorks doc's with 10.8 users.