On 2022-03-01 4:23 p.m., Sebastian Nielsen wrote:
By locking access for POP3 by Google IP, you ensure it can only be used with the fetch feature of Gmail (which do have account-wise rate-limits to prevent password hacking). In this way, you increase security. Of course it must be combined with IP restrictions and firewalling for IMAP and Auth on 587 aswell.
No one commented, that ONLY POP3/SSL should be allowed, otherwise Gmail (or any other similar service) could simply expose the passwords over the clear, allowing those credentials to be sniffed.
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