Gsuite smtp-relay 問題「end of file reached」

[Syonyk (Russell Graves)]

同じ問題に関する議論がこちらで進んでいますが、まだ解決策は見つかっていません。

Emails have stopped sending - end of file reached

Hi all, and apologies if this is similar to some of the other posts that mention this error. For the last four days all emails have stopped getting sent, and the test email also fails. I have browsed through existing topics that are similar, but in my case nothing (that I am aware of) has changed, and email has stopped working after previously working for months without issue. We are using hosting on Digital Ocean, and are using G Suite SMTP relay configured to relay emails from the droplet’s…

あなたのエラー発生時期は、私のもの（約 5 日前に開始）と概ね一致しているようです（ yours は数日前から増加傾向にあったようです）。