On 6/19/20 4:03 AM, skenny@scss.tcd.ie wrote:
Jun 19 11:44:50 venus postfix/lmtp[17630]: C0C7928564: to=<mj@lists.scss.tcd.ie>, relay=172.19.199.2[172.19.199.2]:8024, delay=109, delays=2.2/0.04/0.01/107, dsn=5.0.0, status=bounced (host 172.19.199.2[172.19.199.2] said: 552 Error: Too much mail data (in reply to end of DATA command))
So 172.19.199.2 is complaining about "Too much mail data". That's the IP address of the mailman-core container. I'm wondering why this is happening, and where the decision is being made, as it seems at odds with the fact that the mailing list has no limit on message size.
Mailman's lmtp runner which implements the server that receives mail via LMTP uses the aiosmtpd.lmtp.LMTP class to implement the server. This has a default size limit of 33554432 bytes (32 MB) and that's where the "552 Error: Too much mail data" comes from.
There is also the message_size_limit setting in postfix. Presumably you've changed that because it defaults to 10240000 bytes (about 10 MB).
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan