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0answers
12 views

Risk to pgp secret keys with known cleartext/ciphertext? [duplicate]

There are a couple of schemes which encrypt IMAP message stores to yourself using GPG/PGP. Which makes initial sense and would keep casual snoopers from getting email. But it raises a question as ...
2
votes
0answers
61 views

Should I force Thunderbird to avoid RFC5746 and CVE-2009-3555 security bugs?

I see that the latest version of Thunderbird (38.0.1) still has the defaults set to ignore the error. Is this a big problem? Should I change the defaults to enforce greater security? Here is ...
1
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0answers
65 views

How do I interact with Google to import email via imapsync? [closed]

I am developing an webapp that allows users to migrate a backup of their old mail into an existing webmail account using imapsync. The source of the mail is an old webmail system owned and ...
3
votes
4answers
147 views

How webmail's authorisation should work?

I'm building a webmail client (like gmail). It allows the user to browse emails and send them. Under the hood, php uses IMAP and SMTP to talk with email server. user->webserver->mailserver When user ...
2
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3answers
233 views

Fake “FROM” email to allocate to account

We are allocating emails to their online account. We discovered you can send a false email with a script by changing the "from" or "reply-to" in the email header. There must be a safe way to test the ...
-1
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1answer
201 views

Why not use md5 auth mechanisms for IMAP over TLS?

I'm using Dovecot for IMAP connections. I've read a lot of tutorials on how to set up Dovecot, and a lot of them said to only allow: auth_mechanisms = plain login Why should I not allow *-md5 ...
0
votes
1answer
366 views

Is my Postfix and Dovecot configuration secure?

Today I set up my first server with Dovecot and Postfix. These are excerpts from the configuration files: Dovecot: disable_plaintext_auth = yes ssl = required ssl_prefer_server_ciphers = yes ...
4
votes
1answer
81 views

Opening mail from IMAP with no risk for the user

I'm building a website for an association. Its aim is to, out of other thing, provide an easy mail manager to communicate with the member, stored in a database. This database is always up to date as ...
24
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3answers
13k views

What are the dangers of allowing “less secure apps” to access my Google account?

According to https://support.google.com/accounts/answer/6010255: Google may block sign in attempts from some apps or devices that do not use modern security standards. Since these apps and devices ...
4
votes
3answers
1k views

How to store passwords securely in my server?

Disclaimer: I know I should use bcrypt to securely store user's passwords. Please, keep reading. I want to store credentials for several email services for each user. So if I log in with my username ...
3
votes
1answer
2k views

Do the BEAST and CRIME attacks apply to an IMAP service?

While setting up the Dovecot IMAP service, I noticed that the default parameters are not optimal, it allows SSLv3 for example. Using Thomas Pournin's TestSSLServer.java program, I saw the following: ...
1
vote
1answer
791 views

Distributed IMAP-Dictionary-Attack-Tool?

I have a client with a hacked IMAP-Account, and the attacker(s) made thousands of password-attempts, probably with a fixed set of passwords, from different IPs before they got in. After successful ...