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"Error: message file too large" Is there a restriction on the outgoing or receiving end?

The client tries to send a rather large email address, but it returns back with the following message:

Hi. This is the qmail-send program at server2.hysir.net. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. < maria@laeknastodin.is >: 157.157.98.19 failed after I sent the message. Remote host said: 552 5.3.4 Error: message file too big

I checked and there are no restrictions on the size of outgoing mail at our end, and this ip address, i.e. 157.157.98.19, is the ip for the receiving mail server, am I right to assume that the mail server for laeknastodin.is denies mail because of its size, and not our smtp, which refused to send?

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 Remote host said: 552 5.3.4 Error: message file too big

The error message clearly states that the receiving host limits the size of the message. If you check with telnet, you will see that the limit configured on the target host is 20 MB (20480000 bytes)

 telnet 157.157.98.19 25 Trying 157.157.98.19... Connected to 157.157.98.19. Escape character is '^]'. 220 mail.laeknastodin.is ESMTP Postfix EHLO example.com 250-mail.laeknastodin.is 250-PIPELINING 250-SIZE 20480000 <----------- 20 MB limit 250-VRFY 250-ETRN 250-STARTTLS 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN
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Source: https://habr.com/ru/post/909084/

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