Q: I keep getting "Error 1046" messages when using Mail.app to send Gmail

I was facing the same problem.  However, I have successfully resolved it.  I am not sure if it works for you.

Little Background:  I am using Gmail Commercial account with 2 Step Authentication.

I was facing the same problem.  However, I have successfully resolved it.  I am not sure if it works for you.

Little Background:  I am using Gmail Commercial account with 2 Step Authentication.

When I checked SMTP setting I noticed that my username was given without domain name postfixed.  I updated the same and now I am able to send emails without any problem.

Here is the exact location where I made the change:

Mail->Preference->Accounts->(Select Account)->Outgoing Mail Server (Drop Down)->Edit SMTP Server List->(Select Account)->Advanced->UPDATE USERNAME

Please let me know if it works for you as well.

Thanks,

HS

Thanks Hemmanshu!

Thanks for confirming.

Thanks so much!

In my case it was my password in this menu which was incorrect

Thank you very much! In my case it was the password as well.

it works!!!! Thank you!

Thanks, works for me!!

Thanks for acknowledging the resolution was Helpful.  I am new to this community.

I will keep trying to add value to the community.

<Edited by Host>

I removed @gmail.com after my username at

Mail->Preference->Accounts->(Select Account)->Outgoing Mail Server (Drop Down)->Edit SMTP Server List->(Select Account)->Advanced

And then it worked. I use Yosemite 10.10

Thank you very much for helping me resolve this annoying problem

I am new to this community and not sure if requesting to mark Answer as Helpful or Solved is against the rules.

 

Take a look at the ToU:

Apple Support Communities Use Agreement

The solution for me was to explicitly enter my password in the outgoing server options.  This was only effecting Yahoo and GMail and none of my other iMAP accounts and happened out of nowhere after functioning for some time.  Running 10.10.3.