Shawwwn

Firstly, big thanks for submitting this PR! When I apply the patch, following error has occurred: > go: downloading golang.org/x/net v0.0.0-20200320220750-118fecf932d8 > go: downloading github.com/tjfoc/gmsm v1.3.0 > go: downloading github.com/klauspost/reedsolomon...

I can confirm this issue. After leaving it to run for two days, linux oom killer was triggered. There seems to be a memory leak somewhere but I couldn't find...

Found the culprit! https://github.com/imWildCat/scylla/blob/19c8a2e9035aaef5cd2bc117c24c9049f7d793e7/scylla/scheduler.py#L55-L62 OOM was not caused by memory leak, but resource exhaustion. The exhaustion happens outside of python's vm, therefore can be very hard to trace. I narrowed...

Fixes I could think of are: 1. Slow down validation job submission according to number of worker threads. 2. Implement a custom ThreadPoolExecutor w/e max internal queue size, reject or...

Hello, I can confirm this problem does exist. The culprit is in the following: https://github.com/micropython/micropython-lib/blob/f20d89c6aad9443a696561ca2a01f7ef0c8fb302/uasyncio/uasyncio/__init__.py#L100-L111 If, for some reasons, a call to ios.read() doesn't return anything(this happens to me on...

> In Python, a function always returns something. Did you understand my post or did you have to go word-to-word? I said this happened in "a low memory situation." Socket...

Please don't introduce irrelevant topic into this discussion. Thank you! **Conclusion:** The current uasyncio implementation is uncared of socket error and (judging from the conversation) the issue is not likely...

Possibly related to issue #28 . Sorry you encounter the error, however the problem behind it is beyond the scope of uMail (nothing I can do to fix it). There...

> The weird thing is some of the mail relays that do have SSL (MailJet, SendGrid) still return the TLS error. You are right. Server can force a TLS connection...

ESP8266's port of micropython uses [axTLS](https://docs.micropython.org/en/v1.23.0/esp8266/general.html#ssl-tls-limitations), not MbedTLS. You may need to edit the the port's `Makefile` to increase its TLS buffer size, set `-DRT_EXTRA` to a bigger value. https://github.com/micropython/micropython/blob/18c9abc32930728d0403d8c13994adc3cabba8db/ports/esp8266/Makefile#L51