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Old 23 Oct 2020, 06:44 AM   #1
Edward Velo
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SMTP only login?

Hi,

I have a Fastmail standard account.

I'm running a lot of small Linux applications that can send me an email at certain events via SMTP. However, I don't want to store my login name and password everywhere.

Is there a way to have an "SMTP only" login? So that this login can't be used to actually read my emails if it leaks out? Or should I sign up for an extra account?

Thanks!
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Old 23 Oct 2020, 08:15 AM   #2
placebo
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Yes. You can set up an app password that allows only SMTP access.
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Old 23 Oct 2020, 06:40 PM   #3
Edward Velo
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Thanks! That works indeed.

Just two small questions:

- it only works when I use my main Fastmail login name, is there a way to use one of my aliases?

- the "from" in received emails is always my main email adres, even though the app is using a specific "from" email address when contacting the SMTP server. Can this be changed?

Thanks.
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Old 23 Oct 2020, 11:10 PM   #4
JeremyNicoll
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Quote:
Originally Posted by Edward Velo View Post
- it only works when I use my main Fastmail login name, is there a way to use one of my aliases?
I don't know. But quite a lot of us try very hard never to expose our login names, never ever using it as a real email address, so if it turns out that you can nominate a specific alias for a restricted login, that would be a good thing.

The other thing is that if you ever think your login name has become known to anyone else, you can change it. See:

https://www.fastmail.com/help/accoun...eusername.html
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Old 24 Oct 2020, 07:07 AM   #5
pjroutledge
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Quote:
Originally Posted by Edward Velo View Post

- the "from" in received emails is always my main email adres, even though the app is using a specific "from" email address when contacting the SMTP server. Can this be changed?

Thanks.
I can get this to work by (1) having a matching 'Sending Identity' in Fastmail and (2) (under 'Advanced Preferences' at the bottom of the 'Preferences' screen) by deselecting the 'SMTP Identity' checkbox.
The text adjacent to the checkbox is
Quote:
Rewrite the “From” address on all emails I send through third party email clients to come from my default identity
)

You could also change your default identity and leave the checkbox selected, but then all of your 3rd party client emails would have the same 'From' email address.
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Old 24 Oct 2020, 08:54 AM   #6
placebo
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Quote:
Originally Posted by Edward Velo View Post
Thanks! That works indeed.
- the "from" in received emails is always my main email adres, even though the app is using a specific "from" email address when contacting the SMTP server. Can this be changed?
Hmm, that's weird. I don't see this behavior with my account. I set my client to use a different from address. The received email shows this address, and my main username doesn't appear anywhere in the headers.
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Old 26 Oct 2020, 11:49 PM   #7
Edward Velo
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Quote:
Originally Posted by pjroutledge View Post
I can get this to work by (1) having a matching 'Sending Identity' in Fastmail and (2) (under 'Advanced Preferences' at the bottom of the 'Preferences' screen) by deselecting the 'SMTP Identity' checkbox.
That's it! Thanks.
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Old 28 Oct 2020, 12:20 AM   #8
SideshowBob
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I don't understand the need for "2". You can use an app password to send for any From address provided that there is a webmail identity for that address.

Be sure to use smtp.fastmail.com rather than mail.messagingengine.com.
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Old 28 Oct 2020, 04:23 AM   #9
Edward Velo
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Quote:
Originally Posted by SideshowBob View Post
I don't understand the need for "2". You can use an app password to send for any From address provided that there is a webmail identity for that address.
Without 2, you need to create identities for all the "from"s that you use. When using "2", each app can set its own "from", all using the same login and app password.
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Old 28 Oct 2020, 04:35 AM   #10
SideshowBob
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You can create one wildcard identity per domain or sub-domain.

I still don't see the point of 2 because it causes the from address to be rewritten to a single fixed address. What's the point in sending from separate addresses and then having them all rewritten to the same one.
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Old 28 Oct 2020, 04:44 AM   #11
Edward Velo
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We are deselecting that option. So they are not being rewritten to the same one.
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