Fun fact: GMail is currently bouncing with permanent errors on valid incoming mail but our 32-people "delta chat dev" chat group is not affected ... all involved (roughly 10) different e-mail servers are inter-operating fine.
@delta Do y'all have free public email servers you'd recommend? 🙂
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@MadestMadness @delta you can try protonmail, or tutanota, they are both fine.
@MadestMadness @delta oh, sorry, I thought you meant for general use, I don't know if they can be used in DeltaChat.
@leodurruti @delta Protonmail doesn't provide IMAP on their free tier and Tutanota doesn't provide IMAP at all, though. Doesn't that mean they won't work with DeltaChat?