Unexplained mutt error

[Ion]

I tried both set smtp_url ="smtp://smtp.fastmail.com:465" and set
smtp_url ="smtp://smtp.fastmail.com:587" and got "SMTP session failed:
530 5.7.1 Authentication required".

I used the same password as IMAP as the Fastmail help page tells me
"Your app-specific password. You cannot use your regular Fastmail
password." So does the "set ssl_force_tls =yes" not cover authentication?

On 21/02/2022 16:40, Kevin J. McCarthy wrote:
> On Mon, Feb 21, 2022 at 02:46:11PM -0600, Ion wrote:
>> set smtp_url ="smtp://smtp.fastmail.com:465"
>
>> But the response was...
>>
>> "SMTP session failed: read error"
>
> The prefix 'smtps://' should be used with port 465:
>   set smtp_url ="smtps://smtp.fastmail.com:465"
>
> Alternatively you can use 'smtp://' with port 587 to use STARTTLS:
>   set smtp_url ="smtp://smtp.fastmail.com:587"
>
>> set timeout=15
>> set mail_check=1
>
> You didn't ask, but as an aside, $mail_check of 1 is a bit too
> aggressive for IMAP.  <http://www.mutt.org/doc/manual/#imap> suggests
>   set mail_check=90
>   set timeout=15
> which I think is a fairly balanced approach.
>