mac mail can receive but can't send messages

Try Window->Connection Doctor, what does that show?

Apple addresses this issue in an advice article called Mail Can receive email, but not send email. When I had this issue it was solved by re-inputting all of my Mail preferences even though they appeared correct. By re-inputting them it seemed to reset the Mail.

You also will find answers in Apple's Mail Setup, Troubleshooting etc.. article.

This is how I fixed it.

Mail> Preferences> Accounts> Select the account that won't send emails> Where it says "outgoing mail server (SMTP), click Gmail.

Mine used to say Gmail (offline)

Thanks tweii3,

this works perfectly.

I am using Mail 7.3, on OS X 10.9.4 (i.e. latest as of Aug 2014). I have 4 email accounts, all with their own SMTP servers. All stopped sending email at the same time.

Taking the hint from your suggestion, I looked in Mail > Preferences > Accounts, and all the SMTP servers were shown as offline (this must be a Mac Mail bug). All accounts appear to be Online under Mail > Mailbox (pulldown), and are also Online if one highlights the Inbox account, right click.

The trigger for the bug, in my case, was adding a new email account, and when Mail could not access it, it took everything offline. Removing that account did not solve the problem.

After spending hours trying all sorts of alternatives, I found the way to solve the problem was to delete all the outgoing mail servers, and reenter the information (the same information).

Would you mind sharing HOW you deleted the mail servers? I am stumped.

thanks so much. I have the same issue. Cannot get mail to send at all today.

Never mind. I found that under the edit connections, I could remove them all and then add them back.

PE

Using exactly the same versions of the OS and Mail, I made the changes as suggested and it worked perfectly, ending a couple of weeks of hair-pulling!

Thanks!!!!!

Worked for me too. I was about to throw my laptop out the window. Surprised that Mac mail is so delicate- Really disappointing.

Worked for me too. I was about to throw my laptop out the window. Surprised that Mac mail is so delicate- Really disappointing.

Worked for me too. I was about to throw my laptop out the window. Surprised that Mac mail is so delicate- Really disappointing.

worked for me - BUT very disappointed that MAC mail is so delicate!!

Thank you, it works

Thank you so much. This is really help =)

I found that if I went into mail preferences then to composing, where it says to "send new message from" it read account of selected mailbox, I changed this in the drop down menu to my main email addres and was able to send mail once again.