IP 185.247.137.24 (Manchester, UK) has an abuse confidence score of 100% with 345 reports from 99 us ...
show moreIP 185.247.137.24 (Manchester, UK) has an abuse confidence score of 100% with 345 reports from 99 users. Observed issuing EHLO commands to Stalwart SMTP submission (port 465) using an internet-measurement.com domain, consistent with automated SMTP reconnaissance and scanning.
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IP 77.83.39.14 (AS214940 KPROHOST LLC) with 100% abuse confidence and 1853 reports from 408 users. O ...
show moreIP 77.83.39.14 (AS214940 KPROHOST LLC) with 100% abuse confidence and 1853 reports from 408 users. Observed sending invalid EHLO commands to Stalwart SMTP server on port 25, indicating SMTP probing activity.
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IP 172.235.181.217 has a 100% abuse confidence score with 742 reports from 253 distinct users. Obser ...
show moreIP 172.235.181.217 has a 100% abuse confidence score with 742 reports from 253 distinct users. Observed connecting to SMTP submission port 465 with an EHLO command using a null domain, consistent with SMTP probing or enumeration. Recommend blocking this IP.
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IP 66.132.172.98 (Censys Inc) performed SMTP service reconnaissance via EHLO enumeration. Abuse conf ...
show moreIP 66.132.172.98 (Censys Inc) performed SMTP service reconnaissance via EHLO enumeration. Abuse confidence score 100 with 2126 reports from 447 users.
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IP 141.98.10.138 (AS209605, Lithuania) has an AbuseIPDB confidence score of 100% with 82 reports fro ...
show moreIP 141.98.10.138 (AS209605, Lithuania) has an AbuseIPDB confidence score of 100% with 82 reports from 48 users. Observed sending invalid EHLO commands to SMTP service (Stalwart), indicating SMTP probing/scanning activity consistent with email spam and brute-force reconnaissance.
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IP 217.154.146.145 is being used as a spoofed EHLO domain by multiple remote hosts sending to a Stal ...
show moreIP 217.154.146.145 is being used as a spoofed EHLO domain by multiple remote hosts sending to a Stalwart SMTP server. SPF and IPREV authentication checks consistently fail. One source attempted open-relay reconnaissance using a 'relaycheck_please_ignore' from address. 31 total log occurrences across multiple distinct source IPs indicate coordinated abuse and unauthorized identity spoofing.
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IP 34.107.243.93 (Google Cloud) reported malicious by 27 distinct users with 162 total reports and 8 ...
show moreIP 34.107.243.93 (Google Cloud) reported malicious by 27 distinct users with 162 total reports and 88% abuse confidence. Likely involved in hacking, brute-force, bot, or web application attack activity.
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IP (185.91.69.211) with 100% abuse confidence and 133 reports. Observed sending invalid SMTP EHLO co ...
show moreIP (185.91.69.211) with 100% abuse confidence and 133 reports. Observed sending invalid SMTP EHLO commands with suspicious Windows hostname domain, indicating email spam or SMTP abuse activity.
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IP with 100% abuse confidence (864 reports, 267 distinct users) sending invalid SMTP EHLO commands t ...
show moreIP with 100% abuse confidence (864 reports, 267 distinct users) sending invalid SMTP EHLO commands to Stalwart mail server. Indicative of SMTP probing and potential brute-force or spam preparation activity.
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IP 94.231.206.6 with 100% abuse confidence and 1557 reports from 123 users performed SMTP EHLO recon ...
show moreIP 94.231.206.6 with 100% abuse confidence and 1557 reports from 123 users performed SMTP EHLO reconnaissance using an IP address as the domain, indicating probing/scanning activity targeting the SMTP service.
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Host 213.177.179.12 triggered an Invalid EHLO command on Stalwart SMTP. AbuseIPDB reports 100% confi ...
show moreHost 213.177.179.12 triggered an Invalid EHLO command on Stalwart SMTP. AbuseIPDB reports 100% confidence with 2611 reports from 490 users.
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IP 172.94.9.231 with 100% abuse confidence (23 reports from 23 distinct users) observed sending inva ...
show moreIP 172.94.9.231 with 100% abuse confidence (23 reports from 23 distinct users) observed sending invalid SMTP EHLO commands to Stalwart SMTP listener on port 25.
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IP with 100% abuse confidence score and 243 reports. Observed sending invalid EHLO commands to the S ...
show moreIP with 100% abuse confidence score and 243 reports. Observed sending invalid EHLO commands to the Stalwart SMTP server.
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IP address 178.16.53.13 has a very high abuse confidence score (100%) and has been reported 556 time ...
show moreIP address 178.16.53.13 has a very high abuse confidence score (100%) and has been reported 556 times by 112 distinct users. It was observed sending an invalid EHLO command to a Stalwart SMTP server.
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IP 185.169.4.29 (UAB Host Baltic, Lithuania) has a 100% abuse confidence score with 109 reports from ...
show moreIP 185.169.4.29 (UAB Host Baltic, Lithuania) has a 100% abuse confidence score with 109 reports from 58 distinct users. Observed sending SMTP EHLO with a default Windows-generated hostname (win-clj1b0gq6jp.domain), indicative of spam or malicious email activity.
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IP 82.157.41.63 (Tencent Cloud, Beijing) performed repeated failed authentication attempts against S ...
show moreIP 82.157.41.63 (Tencent Cloud, Beijing) performed repeated failed authentication attempts against Stalwart mail server targeting account [email protected], resulting in an authentication ban. IP has 100% abuse confidence with 223 reports from 95 users.
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IP 185.213.175.248 conducted brute force authentication attacks against a Stalwart mail server, targ ...
show moreIP 185.213.175.248 conducted brute force authentication attacks against a Stalwart mail server, targeting the account [email protected]. IP has a 100% abuse confidence score with 713 reports from 346 distinct users.
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IP 47.236.148.6 (Alibaba US, Singapore) banned by Stalwart mail server for repeated authentication f ...
show moreIP 47.236.148.6 (Alibaba US, Singapore) banned by Stalwart mail server for repeated authentication failures against [email protected]. 100% abuse confidence score with 76 reports from 53 distinct users.
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IP 172.94.9.186 was banned by Stalwart for multiple authentication errors. It has a 100% abuse confi ...
show moreIP 172.94.9.186 was banned by Stalwart for multiple authentication errors. It has a 100% abuse confidence score with 501 total reports.
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