Problem with ssl_opts, when server and server_name_indication are not the same

[andreas-ementio]

with my email services ssl verification does not work.

the genserver crashes and causes this:

[error] GenServer {Yugo.Registry, :fastmail_client} terminating
** (KeyError) key :next_cmd_tag not found in: nil

If you are using the dot syntax, such as map.field, make sure the left-hand side of the dot is a map
    (yugo 1.0.0) lib/yugo/client.ex:654: Yugo.Client.send_command/3
    (stdlib 4.3.1.5) gen_server.erl:1161: :gen_server.try_terminate/3
    (stdlib 4.3.1.5) gen_server.erl:1351: :gen_server.terminate/10
    (stdlib 4.3.1.5) proc_lib.erl:240: :proc_lib.init_p_do_apply/3

which caused some confusion on my side, though it had to do something with the next_cmd_tag

i think the the cause is that the verification does not work on "imap.fastmail.com", it only works on "fastmail.com"

solutions for that could be:

1. a method to change the server_name_indication
2. a custom hostname check like andreas-ementio@ccca909

on a side note: this library handles only receiving new email and not fetching already existing emails in the inbox or am i missing something?

[Flying-Toast]

If you send a PR for andreas-ementio@ccca909 I'd be open to merging it.

on a side note: this library handles only receiving new email and not fetching already existing emails in the inbox or am i missing something?

That's correct, my use case for making the library didn't require fetching existing emails. I am not opposed to adding that functionality though - there was even some talk about it in #24 but you'd have to check with @bkono on the status of that.

[bkono]

Apologies, got pulled off to a different project for a bit and haven't cleaned up / broken down my changes to a place where I was comfortable sending a PR. I just pushed an updated version of the branch currently being used in one of my projects, @andreas-ementio you're welcome to scan the commits I've added and see if there's anything useful in there.

At the moment, it has some needed tweaks to address parsing / tag flowing etc, and a usable implementation of capability listing, mailbox listing, count of messages in a mailbox, mailbox creation, message move support, message fetching ... probably forgetting something else I needed along the way. 😆

[Themanwhosmellslikesugar]

Hi, if it helps anyone, the error with the key :next_cmd_tag not found in: nil can occur due to an old version of OTP. In version <25 there's no :public_key.cacerts_get() function, because of this the client creation fails. I solved this problem by updating OTP to version 25.