On 13/03/2022 20:06, Mike Tubby via Exim-users wrote: > 2022-03-13 19:47:53 1nTTGO-0001Jw-Tr H=alt2.gmail-smtp-in.l.google.com [2a00:1450:4025:c03::1a]: SMTP timeout after sending data block (476909 bytes written): Connection timed out
Google doesn't want to talk to you, at least on that IP.
By the way, Thunderbird isn't an MTA.
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Cheers,
Jeremy